diff --git a/Cargo.toml b/Cargo.toml
index f587e00..551c369 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,6 +34,10 @@ path="src/day05/solve.rs"
 name="day06"
 path="src/day06/solve.rs"
 
+[[bin]]
+name="day07"
+path="src/day07/solve.rs"
+
 [dependencies]
 regex="1"
 once_cell = "1.16.0"
diff --git a/src/day07/fileTree.rs b/src/day07/fileTree.rs
new file mode 100644
index 0000000..57c81e9
--- /dev/null
+++ b/src/day07/fileTree.rs
@@ -0,0 +1,21 @@
+use std::{rc::{Weak, Rc}, cell::RefCell};
+
+#[derive(Debug)]
+pub struct Dir {
+    parent: Option<Weak<RefCell<Dir>>>,
+    name: String,
+    children: Vec<Rc<RefCell<FileOrDir>>>
+}
+
+#[derive(Debug)]
+pub struct File{
+    dir: Weak<RefCell<Dir>>,
+    size: usize,
+    name: String
+}
+
+#[derive(Debug)]
+pub enum FileOrDir{
+    File(File),
+    Dir(Dir),
+}
diff --git a/src/day07/input.txt b/src/day07/input.txt
index e69de29..a8fc774 100644
--- a/src/day07/input.txt
+++ b/src/day07/input.txt
@@ -0,0 +1,1031 @@
+$ cd /
+$ ls
+dir bhtvbj
+dir bmlllrl
+dir dhm
+dir mnp
+dir nwqgchw
+$ cd bhtvbj
+$ ls
+dir dmd
+dir fjblqtdp
+25595 mdmtpjq.wmf
+dir qhm
+dir rjr
+dir smtrp
+dir tbdsml
+$ cd dmd
+$ ls
+232616 ngmqbc.mdj
+75367 vqqcvgts.vrc
+$ cd ..
+$ cd fjblqtdp
+$ ls
+dir czvcf
+dir jnzwf
+245590 lcpgtrc.dqm
+141631 nwqgchw
+37152 nwqgchw.ppg
+80432 rbj.twt
+$ cd czvcf
+$ ls
+dir cqzcp
+dir czvcf
+$ cd cqzcp
+$ ls
+dir bshmsns
+55418 svhphd
+232179 vqqcvgts.vrc
+$ cd bshmsns
+$ ls
+243135 rbhprlgq.gbh
+$ cd ..
+$ cd ..
+$ cd czvcf
+$ ls
+158882 lhfsc.lrh
+266626 ntsrpn
+$ cd ..
+$ cd ..
+$ cd jnzwf
+$ ls
+108142 btmz
+$ cd ..
+$ cd ..
+$ cd qhm
+$ ls
+162986 bnqbdmm.dfh
+dir hqbhr
+201987 hwvdlfl
+dir lvdrr
+143900 nwcjvb
+dir rgtcchh
+297583 wdcsgg.cjt
+$ cd hqbhr
+$ ls
+175196 btmz
+dir fcm
+221851 ngmqbc
+dir qnlssvn
+263872 rdzsz.grd
+dir vvbgt
+dir wwzwqqh
+$ cd fcm
+$ ls
+66471 sfddtgp.flr
+$ cd ..
+$ cd qnlssvn
+$ ls
+dir czvcf
+dir gngvc
+75812 lbthznl.llq
+182104 nwqgchw.nlq
+161446 rrvwdw.nzv
+dir rzssqpcj
+260877 wdcsgg.cjt
+$ cd czvcf
+$ ls
+202850 vqqcvgts.vrc
+$ cd ..
+$ cd gngvc
+$ ls
+154834 rdzsz.hst
+$ cd ..
+$ cd rzssqpcj
+$ ls
+66116 bdzdp
+$ cd ..
+$ cd ..
+$ cd vvbgt
+$ ls
+288775 cpsmvwq
+dir fbfddwqz
+81857 jcpj.wpf
+dir nwjps
+49905 tlrlbg.mgz
+64870 wdcsgg.cjt
+131013 zbc.rhl
+$ cd fbfddwqz
+$ ls
+100619 wdcsgg.cjt
+$ cd ..
+$ cd nwjps
+$ ls
+96526 cjrvb.tdv
+$ cd ..
+$ cd ..
+$ cd wwzwqqh
+$ ls
+dir czvcf
+$ cd czvcf
+$ ls
+256121 nrjfpjc.wcg
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd lvdrr
+$ ls
+27488 lhfsc.lrh
+$ cd ..
+$ cd rgtcchh
+$ ls
+19285 bfdfz.rln
+166070 btmz
+222301 vqqcvgts.vrc
+$ cd ..
+$ cd ..
+$ cd rjr
+$ ls
+dir dbb
+121292 drv.ljf
+dir ntbbd
+228025 rphtjh.ngl
+133033 wrlwdgz
+$ cd dbb
+$ ls
+158756 btmz
+130326 czvcf.trn
+dir fdgh
+dir grr
+20181 wdcsgg.cjt
+$ cd fdgh
+$ ls
+24629 rph.rsl
+299233 wdcsgg.cjt
+$ cd ..
+$ cd grr
+$ ls
+259732 tqvvp
+$ cd ..
+$ cd ..
+$ cd ntbbd
+$ ls
+dir cwwhvghw
+dir hggcq
+169994 jrvt.srj
+dir jtzbw
+dir ptr
+215668 smcngpwr
+dir tfshcbw
+$ cd cwwhvghw
+$ ls
+dir czvcf
+167719 dzltv
+dir mdgqwdjq
+265831 pcfcw.jrd
+86965 qsdv
+71709 tdbtjwzp.msg
+dir vtbr
+$ cd czvcf
+$ ls
+dir ntj
+dir nwqgchw
+dir rdzsz
+202867 vqqcvgts.vrc
+$ cd ntj
+$ ls
+214072 ntplhvnn.zpt
+$ cd ..
+$ cd nwqgchw
+$ ls
+228489 qfphslzt
+15383 zfpdpds.bjt
+$ cd ..
+$ cd rdzsz
+$ ls
+dir jrvt
+6415 jrvt.vjt
+290773 mhfwsc.nlr
+82027 wdcsgg.cjt
+$ cd jrvt
+$ ls
+85079 mnq.jvr
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd mdgqwdjq
+$ ls
+223814 phghj
+172175 wwpvcb
+$ cd ..
+$ cd vtbr
+$ ls
+134023 frwc.dhg
+26692 fvgscmns.mpj
+148404 wnlgfmdr.dch
+$ cd ..
+$ cd ..
+$ cd hggcq
+$ ls
+19064 btmz
+200043 lswzn
+dir mlrj
+49427 rcwmzz.nsn
+dir wjznmcw
+$ cd mlrj
+$ ls
+10869 czvcf.fvc
+277796 gprlsg.tbt
+$ cd ..
+$ cd wjznmcw
+$ ls
+43168 bzwn
+dir dznz
+4102 lcpgtrc.dqm
+dir ltcpgcdf
+228100 nwqgchw.mgc
+dir tbdqsnb
+dir tmzswrgt
+19984 whgmsm.bjj
+$ cd dznz
+$ ls
+59403 msqdt.mlm
+$ cd ..
+$ cd ltcpgcdf
+$ ls
+dir czvcf
+10727 jgphjm.pdw
+309167 nwqgchw
+dir pwbt
+dir qznbn
+203154 ztpcdmb.rrs
+$ cd czvcf
+$ ls
+173609 pntjz.vzq
+292292 trvbpz.djc
+111008 wdcsgg.cjt
+107437 wjvv.hsj
+265353 wsbff.pzh
+$ cd ..
+$ cd pwbt
+$ ls
+307172 jtdtlbsh
+dir lgz
+$ cd lgz
+$ ls
+dir fnlsq
+$ cd fnlsq
+$ ls
+161356 jrvt.ljb
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qznbn
+$ ls
+12354 bdgvj
+59582 cslzb.qnq
+dir czvcf
+dir psnpf
+136432 vlsswwgv
+99861 vqqcvgts.vrc
+39898 wzllwpmr.mqc
+$ cd czvcf
+$ ls
+dir dqnpjjrv
+13244 ztcpzzr
+$ cd dqnpjjrv
+$ ls
+233675 ngmqbc.srp
+$ cd ..
+$ cd ..
+$ cd psnpf
+$ ls
+1986 lhfsc.lrh
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd tbdqsnb
+$ ls
+170099 hbcnv.gmj
+$ cd ..
+$ cd tmzswrgt
+$ ls
+118969 btmz
+dir czvcf
+51649 hbb.jcb
+$ cd czvcf
+$ ls
+163330 hhcf
+159514 wdhw
+22876 wtn.pnb
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd jtzbw
+$ ls
+55634 rdzsz.dgf
+$ cd ..
+$ cd ptr
+$ ls
+49447 wdcsgg.cjt
+$ cd ..
+$ cd tfshcbw
+$ ls
+193480 btmz
+44402 sjsgfmts.dtc
+115952 vqncb.ssf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd smtrp
+$ ls
+dir hlpzdbwp
+307696 jrvt.hds
+300691 lcpgtrc.dqm
+dir nflt
+dir qcph
+dir qlrdf
+$ cd hlpzdbwp
+$ ls
+dir czvcf
+dir frzvnrb
+dir jrvt
+$ cd czvcf
+$ ls
+155141 lcpgtrc.dqm
+$ cd ..
+$ cd frzvnrb
+$ ls
+71241 btmz
+dir rdzsz
+dir vdb
+$ cd rdzsz
+$ ls
+35362 jngsmcrm.pwt
+$ cd ..
+$ cd vdb
+$ ls
+239928 jrvt.nbf
+16883 ngmqbc
+$ cd ..
+$ cd ..
+$ cd jrvt
+$ ls
+dir lcchtcz
+$ cd lcchtcz
+$ ls
+199091 qzsh.fst
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nflt
+$ ls
+219987 nwqgchw.qpf
+dir rdzsz
+257069 wdcsgg.cjt
+$ cd rdzsz
+$ ls
+dir zmgf
+$ cd zmgf
+$ ls
+dir vwcvbff
+$ cd vwcvbff
+$ ls
+157598 qsp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qcph
+$ ls
+158708 cdj.bch
+dir drdpdzj
+dir jrvt
+109459 lhfsc.lrh
+dir ngmqbc
+164488 rtnvpg
+23729 vqqcvgts.vrc
+115775 wdcsgg.cjt
+$ cd drdpdzj
+$ ls
+dir ngwcr
+dir pwffm
+dir vcclwq
+$ cd ngwcr
+$ ls
+76003 rqjbn
+84407 vqqcvgts.vrc
+$ cd ..
+$ cd pwffm
+$ ls
+284565 rzdjrmn.jdz
+$ cd ..
+$ cd vcclwq
+$ ls
+137044 czvcf.qll
+3433 nwqgchw
+18027 vqqcvgts.vrc
+$ cd ..
+$ cd ..
+$ cd jrvt
+$ ls
+57605 vljs
+$ cd ..
+$ cd ngmqbc
+$ ls
+217554 btmz
+96485 lhfsc.lrh
+dir lpcr
+dir sltwgmjv
+dir snll
+dir tsq
+218323 vqqcvgts.vrc
+150009 wdcsgg.cjt
+$ cd lpcr
+$ ls
+227650 qhfz.grc
+$ cd ..
+$ cd sltwgmjv
+$ ls
+39536 fncjl.vlr
+248067 lcpgtrc.dqm
+$ cd ..
+$ cd snll
+$ ls
+70368 btmz
+195228 svmdc.pcv
+$ cd ..
+$ cd tsq
+$ ls
+271904 vqqcvgts.vrc
+104043 wbgwpcl
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qlrdf
+$ ls
+dir dqgln
+dir ngmqbc
+dir ntngh
+$ cd dqgln
+$ ls
+dir qdrszjvm
+$ cd qdrszjvm
+$ ls
+199245 lcpgtrc.dqm
+$ cd ..
+$ cd ..
+$ cd ngmqbc
+$ ls
+171851 czvcf.jft
+dir ngmqbc
+dir qdffn
+$ cd ngmqbc
+$ ls
+14596 jjhmhzs.dww
+$ cd ..
+$ cd qdffn
+$ ls
+dir czvcf
+$ cd czvcf
+$ ls
+130227 jhqhd.fdz
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ntngh
+$ ls
+243908 bqjfjnl.pcl
+112351 btmz
+30167 lcpgtrc.dqm
+249181 mfwcvc.zdg
+dir qlhw
+157482 vqqcvgts.vrc
+$ cd qlhw
+$ ls
+267233 gfhthp.prr
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd tbdsml
+$ ls
+44152 btmz
+143454 cpzlrsh
+47848 crdvhbt.dfr
+dir gvjhlqdd
+171842 mgljcrw.trm
+dir nqsq
+dir rdzsz
+$ cd gvjhlqdd
+$ ls
+177040 ffbm
+$ cd ..
+$ cd nqsq
+$ ls
+dir fchtl
+dir jrvt
+dir nsgbjwbt
+dir qcz
+dir vqlnqvwn
+55184 wlspgz
+dir wzm
+dir zpw
+$ cd fchtl
+$ ls
+193793 btmz
+164089 jrvt.hzn
+53839 lpv.gtg
+dir qmfwds
+dir sqznc
+dir tdqg
+dir zvd
+$ cd qmfwds
+$ ls
+dir dqtbp
+236341 lcpgtrc.dqm
+101548 rdzsz.vqr
+180341 wzpdq.gjr
+$ cd dqtbp
+$ ls
+56177 hdgnthn.dff
+56834 jrvt.nmg
+$ cd ..
+$ cd ..
+$ cd sqznc
+$ ls
+282988 dpdfvn.spw
+248737 tzfd.pfd
+$ cd ..
+$ cd tdqg
+$ ls
+251266 rdzsz.dhb
+$ cd ..
+$ cd zvd
+$ ls
+124979 ngmqbc
+$ cd ..
+$ cd ..
+$ cd jrvt
+$ ls
+206684 dbbppj.sds
+189832 jvst.fzr
+$ cd ..
+$ cd nsgbjwbt
+$ ls
+32810 btmz
+$ cd ..
+$ cd qcz
+$ ls
+dir bjbsl
+dir brvgznjr
+98771 btmz
+dir gbfhz
+dir ngmqbc
+88248 rccpzctp.gwn
+dir rdzsz
+39060 tqswrdh.wfc
+dir ztnv
+$ cd bjbsl
+$ ls
+1312 rdzsz.qtl
+$ cd ..
+$ cd brvgznjr
+$ ls
+98988 lhfsc.lrh
+$ cd ..
+$ cd gbfhz
+$ ls
+96203 hgldz
+28558 nwqgchw
+dir qrzd
+240140 wjww.hjf
+$ cd qrzd
+$ ls
+231108 hjfcwvtq
+$ cd ..
+$ cd ..
+$ cd ngmqbc
+$ ls
+dir cpjvd
+dir vrbfcwc
+$ cd cpjvd
+$ ls
+142549 btmz
+dir ngmqbc
+$ cd ngmqbc
+$ ls
+62008 vqqcvgts.vrc
+$ cd ..
+$ cd ..
+$ cd vrbfcwc
+$ ls
+dir czj
+$ cd czj
+$ ls
+48640 btmz
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rdzsz
+$ ls
+dir czvcf
+dir fmgmgmp
+dir jrvt
+308389 lhfsc.lrh
+dir nfdh
+dir ptgsd
+dir qmg
+244691 vqqcvgts.vrc
+$ cd czvcf
+$ ls
+dir fqjrb
+dir jbtgpl
+dir jstzjf
+299095 lcpgtrc.dqm
+122426 lhfsc.lrh
+dir wczwphjh
+219013 wdcsgg.cjt
+$ cd fqjrb
+$ ls
+dir fpspthg
+dir hdmtsv
+118041 mwlsw.fvs
+dir rdzsz
+99976 wdcsgg.cjt
+$ cd fpspthg
+$ ls
+280707 hmwsq
+$ cd ..
+$ cd hdmtsv
+$ ls
+102842 btmz
+72949 fpzqpqb.zjp
+$ cd ..
+$ cd rdzsz
+$ ls
+36159 sjtwbsvc
+$ cd ..
+$ cd ..
+$ cd jbtgpl
+$ ls
+139817 lhfsc.lrh
+139333 nwqgchw.wrz
+$ cd ..
+$ cd jstzjf
+$ ls
+dir gngbnq
+54929 lcpgtrc.dqm
+dir pdbdwmc
+$ cd gngbnq
+$ ls
+dir bfvsz
+dir pndfrjhz
+$ cd bfvsz
+$ ls
+283370 mdf.wvc
+$ cd ..
+$ cd pndfrjhz
+$ ls
+252824 lhfsc.lrh
+$ cd ..
+$ cd ..
+$ cd pdbdwmc
+$ ls
+dir nwqgchw
+dir sdmfntl
+266823 vqqcvgts.vrc
+$ cd nwqgchw
+$ ls
+dir bnfhbvmr
+$ cd bnfhbvmr
+$ ls
+62602 lrmmtjmv
+$ cd ..
+$ cd ..
+$ cd sdmfntl
+$ ls
+93365 njfgsgm.jtv
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd wczwphjh
+$ ls
+164840 lcpgtrc.dqm
+$ cd ..
+$ cd ..
+$ cd fmgmgmp
+$ ls
+292610 jglzqc.mss
+dir rdzsz
+dir rrrjw
+$ cd rdzsz
+$ ls
+295660 lcpgtrc.dqm
+$ cd ..
+$ cd rrrjw
+$ ls
+dir lsc
+$ cd lsc
+$ ls
+280045 dljtrq.tll
+dir nwqgchw
+$ cd nwqgchw
+$ ls
+162525 lhfsc.lrh
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd jrvt
+$ ls
+227518 pcsqv
+$ cd ..
+$ cd nfdh
+$ ls
+304769 ngmqbc.qhd
+$ cd ..
+$ cd ptgsd
+$ ls
+281593 cpfzhhd
+123541 hhlhssqb.szt
+250182 lcpgtrc.dqm
+dir ngmqbc
+229226 pppmnp
+dir wntfhzqf
+dir zchjnbz
+$ cd ngmqbc
+$ ls
+202162 vqqcvgts.vrc
+$ cd ..
+$ cd wntfhzqf
+$ ls
+dir czvcf
+dir rdzsz
+dir wvhznt
+$ cd czvcf
+$ ls
+250212 bzwsvd.lhc
+$ cd ..
+$ cd rdzsz
+$ ls
+244145 ngmqbc.lfb
+236278 plnjrm.rgs
+$ cd ..
+$ cd wvhznt
+$ ls
+264719 czvcf.cgn
+$ cd ..
+$ cd ..
+$ cd zchjnbz
+$ ls
+dir jrvt
+dir msrs
+dir vtrcs
+$ cd jrvt
+$ ls
+154825 jrvt
+44966 rdzsz
+198819 vnnrqcbr.fjf
+$ cd ..
+$ cd msrs
+$ ls
+188969 cwbq.ltd
+$ cd ..
+$ cd vtrcs
+$ ls
+2014 jmvvq.pvn
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qmg
+$ ls
+dir dqfs
+dir hwnbws
+dir ngmqbc
+$ cd dqfs
+$ ls
+130929 smwcjg.vjm
+$ cd ..
+$ cd hwnbws
+$ ls
+dir vsq
+$ cd vsq
+$ ls
+196984 twlvvd.qlc
+$ cd ..
+$ cd ..
+$ cd ngmqbc
+$ ls
+212410 cdzjjw
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ztnv
+$ ls
+167568 pwrsss
+64234 rlprpl
+$ cd ..
+$ cd ..
+$ cd vqlnqvwn
+$ ls
+19448 lcpgtrc.dqm
+$ cd ..
+$ cd wzm
+$ ls
+123271 lhfsc.lrh
+dir ngmqbc
+dir qvvvdl
+$ cd ngmqbc
+$ ls
+dir bdjfhmvz
+101745 cqg
+dir ngmqbc
+119605 ngmqbc.lnd
+dir tnfr
+dir wfzct
+$ cd bdjfhmvz
+$ ls
+104287 jrvt.nnj
+$ cd ..
+$ cd ngmqbc
+$ ls
+88793 nwqgchw
+$ cd ..
+$ cd tnfr
+$ ls
+dir nggnpj
+161400 vqqcvgts.vrc
+$ cd nggnpj
+$ ls
+308915 btmz
+81154 jjtwrbtw.bln
+50902 sfppg.hvn
+dir tpg
+$ cd tpg
+$ ls
+143630 vqqcvgts.vrc
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd wfzct
+$ ls
+71154 bzhzl.zcg
+$ cd ..
+$ cd ..
+$ cd qvvvdl
+$ ls
+185898 nwqgchw.tvr
+$ cd ..
+$ cd ..
+$ cd zpw
+$ ls
+167347 bcfj.lch
+dir fldmgj
+dir jspslmwp
+199949 rdsz.dng
+$ cd fldmgj
+$ ls
+154330 sbftm.wmt
+$ cd ..
+$ cd jspslmwp
+$ ls
+75378 jrvt.jdw
+26174 mzthsl.qtv
+214743 njjdqsr
+29213 tsdnqwj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rdzsz
+$ ls
+263486 cfjb.mfc
+77949 fjnfp.lcl
+262618 lcpgtrc.dqm
+124555 lhfsc.lrh
+dir pngmr
+$ cd pngmr
+$ ls
+305791 fdvbthn.cvs
+32332 rdjvldmt.lfw
+dir rwwqsl
+dir rzgv
+$ cd rwwqsl
+$ ls
+158602 bmqnqtz
+dir cvphd
+dir hpb
+$ cd cvphd
+$ ls
+119828 hfhvv.ffp
+dir qbvcjq
+257077 wdcsgg.cjt
+$ cd qbvcjq
+$ ls
+dir nwqgchw
+$ cd nwqgchw
+$ ls
+127576 lcpgtrc.dqm
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd hpb
+$ ls
+176379 nwqgchw
+166831 qhdgmsvv.bdr
+$ cd ..
+$ cd ..
+$ cd rzgv
+$ ls
+56544 pngtztnf.gdt
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd bmlllrl
+$ ls
+270146 chqqnfpn.dfs
+dir ngmqbc
+dir rdzsz
+70712 vqqcvgts.vrc
+$ cd ngmqbc
+$ ls
+dir rgcrvvgj
+301804 vqqcvgts.vrc
+$ cd rgcrvvgj
+$ ls
+219577 jwrlwq
+$ cd ..
+$ cd ..
+$ cd rdzsz
+$ ls
+290477 nwqgchw.rng
+$ cd ..
+$ cd ..
+$ cd dhm
+$ ls
+127736 npznvgqn.bdd
+59221 smmlzfj.lhh
+22345 zhfpvppf.gtn
+$ cd ..
+$ cd mnp
+$ ls
+dir gdntwv
+dir qlsfmcqp
+dir schlsbb
+$ cd gdntwv
+$ ls
+133571 btmz
+$ cd ..
+$ cd qlsfmcqp
+$ ls
+244176 bffzdczp.gqf
+12060 cqlvm.wdd
+dir jnl
+14040 ldczcfl
+dir nwqgchw
+243637 sphmmcv
+290808 wdcsgg.cjt
+$ cd jnl
+$ ls
+252674 lcpgtrc.dqm
+$ cd ..
+$ cd nwqgchw
+$ ls
+258944 btmz
+$ cd ..
+$ cd ..
+$ cd schlsbb
+$ ls
+dir fpbrwnz
+dir hnrh
+101456 rtqfwbl
+$ cd fpbrwnz
+$ ls
+232867 btmz
+150179 cmq.tgm
+249603 jztmgg.dlb
+dir mqhz
+62465 wdcsgg.cjt
+$ cd mqhz
+$ ls
+232359 rdzsz.lhj
+25201 vpjbmjd.zvt
+277414 vqqcvgts.vrc
+$ cd ..
+$ cd ..
+$ cd hnrh
+$ ls
+dir dmghrm
+290254 lcpgtrc.dqm
+dir tbbp
+104510 vqqcvgts.vrc
+$ cd dmghrm
+$ ls
+16799 vqqcvgts.vrc
+$ cd ..
+$ cd tbbp
+$ ls
+14688 jrvt
+45492 wdcsgg.cjt
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nwqgchw
+$ ls
+21374 lhfsc.lrh
+121726 wdcsgg.cjt
+
diff --git a/src/day07/parser.rs b/src/day07/parser.rs
new file mode 100644
index 0000000..54c7d96
--- /dev/null
+++ b/src/day07/parser.rs
@@ -0,0 +1,155 @@
+use crate::fileTree::*;
+use once_cell::sync::Lazy;
+use regex::Regex;
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum Command {
+    CdRoot,
+    CdUp,
+    Cd(String),
+    Ls(Vec<LsEntry>),
+}
+#[derive(Debug, PartialEq, Eq)]
+pub enum LsEntry {
+    Dir(String),
+    File(ParseFile),
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct ParseFile {
+    size: usize,
+    name: String,
+}
+pub fn parse(input: &str) -> Dir {
+    unimplemented!()
+}
+
+pub fn parse_to_tree(input: Vec<Command>) -> Dir {
+    unimplemented!()
+}
+
+//parses a single line
+pub fn parse_to_commands(input: &str) -> Vec<Command> {
+    static PARSE_COMMAND_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"^$").unwrap());
+    unimplemented!()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    /* #[test]
+    fn test_parse() {
+        let input = "$ cd /
+$ ls
+dir a
+14848514 b.txt
+8504156 c.dat
+dir d
+$ cd a
+$ ls
+dir e
+29116 f
+2557 g
+62596 h.lst
+$ cd e
+$ ls
+584 i
+$ cd ..
+$ cd ..
+$ cd d
+$ ls
+4060174 j
+8033020 d.log
+5626152 d.ext
+7214296 k";
+        assert_eq!(parse(input), 0);
+    } */
+
+    #[test]
+    fn test_parse_to_commands() {
+        let input = "$ cd /
+$ ls
+dir a
+14848514 b.txt
+8504156 c.dat
+dir d
+$ cd a
+$ ls
+dir e
+29116 f
+2557 g
+62596 h.lst
+$ cd e
+$ ls
+584 i
+$ cd ..
+$ cd ..
+$ cd d
+$ ls
+4060174 j
+8033020 d.log
+5626152 d.ext
+7214296 k";
+        assert_eq!(
+            parse_to_commands(input),
+            vec![
+                Command::CdRoot,
+                Command::Ls(vec![
+                    LsEntry::Dir(String::from("a")),
+                    LsEntry::File(ParseFile {
+                        size: 14848514,
+                        name: String::from("b.txt")
+                    }),
+                    LsEntry::File(ParseFile {
+                        size: 8504156,
+                        name: String::from("c.dat")
+                    }),
+                    LsEntry::Dir(String::from("d"))
+                ]),
+                Command::Cd(String::from("a")),
+                Command::Ls(vec![
+                    LsEntry::Dir(String::from("e")),
+                    LsEntry::File(ParseFile {
+                        size: 29116,
+                        name: String::from("f")
+                    }),
+                    LsEntry::File(ParseFile {
+                        size: 2557,
+                        name: String::from("g")
+                    }),
+                    LsEntry::File(ParseFile {
+                        size: 62596,
+                        name: String::from("h.lst")
+                    }),
+                ]),
+                Command::Cd(String::from("e")),
+                Command::Ls(vec![LsEntry::File(ParseFile {
+                    size: 484,
+                    name: String::from("i")
+                }),]),
+                Command::CdUp,
+                Command::CdUp,
+                Command::Cd(String::from("d")),
+                Command::Ls(vec![
+                    LsEntry::File(ParseFile {
+                        size: 4060174,
+                        name: String::from("j")
+                    }),
+                    LsEntry::File(ParseFile {
+                        size: 8033020,
+                        name: String::from("d.log")
+                    }),
+                    LsEntry::File(ParseFile {
+                        size: 5626152,
+                        name: String::from("d.ext")
+                    }),
+                    LsEntry::File(ParseFile {
+                        size: 7214296,
+                        name: String::from("k")
+                    }),
+                ]),
+            ]
+        )
+    }
+}
diff --git a/src/day07/part1.rs b/src/day07/part1.rs
index 4074daf..147423b 100644
--- a/src/day07/part1.rs
+++ b/src/day07/part1.rs
@@ -1,4 +1,5 @@
-use crate::utilities::*;
+use crate::fileTree::*;
+use crate::parser::*;
 
 pub fn part1() -> usize {
     unimplemented!()
diff --git a/src/day07/part2.rs b/src/day07/part2.rs
index 246b113..82d67bd 100644
--- a/src/day07/part2.rs
+++ b/src/day07/part2.rs
@@ -1,4 +1,5 @@
-use crate::utilities::*;
+use crate::fileTree::*;
+use crate::parser::*;
 
 pub fn part2() -> usize {
     unimplemented!()
diff --git a/src/day07/solve.rs b/src/day07/solve.rs
index c613d23..d090dcf 100644
--- a/src/day07/solve.rs
+++ b/src/day07/solve.rs
@@ -1,10 +1,11 @@
 mod part1;
 mod part2;
-mod utilities;
+mod parser;
+mod fileTree;
 
 fn main() {
     let _input = include_str!("./input.txt");
-    let _structured_input = utilities::parse(_input);
+    let _structured_input = parser::parse(_input);
 
     println!("Part One");
     println!("Result: {}", part1::part1());
diff --git a/src/day07/utilities.rs b/src/day07/utilities.rs
deleted file mode 100644
index be3e53c..0000000
--- a/src/day07/utilities.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-pub fn parse(input: &str) -> usize {
-    unimplemented!()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_parse() {
-        let input =
-"test"
-;
-        assert_eq!(parse(input), 0);
-    }
-}