diff --git a/2025/11.rs b/2025/11.rs
new file mode 100644
index 0000000..656889f
--- /dev/null
+++ b/2025/11.rs
@@ -0,0 +1,57 @@
+---cargo
+[profile.dev]
+opt-level = 3
+
+[dependencies]
+nalgebra = "0.34"
+---
+
+use nalgebra::DMatrix;
+use std::collections::HashMap;
+
+static CONTENT: &'static str = include_str!("./inputs/11_1.txt");
+
+fn main() {
+    let parts: HashMap<[char; 3], (usize, Vec<[char; 3]>)> = CONTENT.lines().map(|l| l.trim()).map(|p| {
+        let (key, rest) = p.split_once(':').unwrap();
+        let key = key.trim();
+        let rest = rest.trim();
+
+        let key: [char; 3] = core::array::from_fn(|idx| key.chars().nth(idx).unwrap());
+        let rest: Vec<[char; 3]> = rest.split(' ').map(|p| {
+            core::array::from_fn(|idx| p.chars().nth(idx).unwrap())
+        }).collect();
+
+        (key, rest)
+    }).chain([(['o', 'u', 't'], Vec::new())]).enumerate().map(|(idx, (key, v))| (key, (idx, v))).collect();
+
+    println!("{:?}", parts);
+
+    let mut adj_matrix = DMatrix::from_element(parts.len(), parts.len(), 0u64);
+
+    for (src, (src_idx, targets)) in parts.iter() {
+        for dest_idx in targets.iter().map(|t| parts.get(t).map(|(i, _)| i).unwrap()) {
+            adj_matrix[(*src_idx, *dest_idx)] = 1;
+        }
+    }
+
+    println!("{}", adj_matrix);
+
+    let you_idx: usize = parts.get(&['y', 'o', 'u']).map(|(idx, _)| *idx).unwrap();
+    let out_idx: usize = parts.get(&['o', 'u', 't']).map(|(idx, _)| *idx).unwrap();
+
+    let mut total_routes = 0;
+
+    let mut connectivity_matrix = DMatrix::identity(parts.len(), parts.len());
+    for length in 1..=parts.len() {
+        println!("Length: {:?}", length);
+        connectivity_matrix *= &adj_matrix;
+
+        let routes: u64 = connectivity_matrix[(you_idx, out_idx)];
+        println!("Routes: {}", routes);
+
+        total_routes += routes;
+    }
+
+    println!("Total Routes: {}", total_routes);
+}
diff --git a/2025/inputs/11_1.txt b/2025/inputs/11_1.txt
new file mode 100644
index 0000000..61c3843
--- /dev/null
+++ b/2025/inputs/11_1.txt
@@ -0,0 +1,576 @@
+nzm: rdg art kvn ljd nrj
+pvs: kmc fxz njx amt
+ext: xfz inf kzr
+hwq: jpw yjw vkt
+ygr: wtu vbc hkc
+gly: ujv mtz zcc
+bjl: blz pmb
+cst: uej kcg
+zqw: dta udx fhr slm qsa xsm yif ych wcj hbl xth crj fjy ebp piy snu eyt cpz gqb nwk jjt kfd
+tyl: rzk wcc zti jex eqn xbm uqa ceu mgw urj gvj iel zuh
+llk: aij
+rby: rsc
+waa: rae bsg
+rcu: art kvn nrj
+sev: drf tod
+tqj: ydc fzm
+eep: xlo poa iqd
+xas: lws xdb qbt
+cfg: uzb
+bcg: jaf zpm oql
+zqg: xsg hsq
+tqb: vic zle tyl hnh
+wgu: doq ekw jyi
+ned: kzx lvb tza idx
+vtt: gls rvi ppv otq
+lky: wfk rpg aij
+wcc: pxu zel bth
+lqv: njx amt kmc fxz opq
+led: hkc yzo wtu vbc
+vks: cfy zud
+hck: kzx lvb tza
+loe: lym
+zko: qya
+tod: nre fxv
+fxv: fkd ekg mmm xba
+qjj: hud fkd ekg mmm xba
+sjw: you vkz
+pnj: hwq mot ydw
+ydv: kzt ssj vwa
+leu: qbt
+ljn: rcf fmw
+kuy: tyl hnh ibk vic
+ezr: vrk vwa
+pfr: vap
+zpo: sit sfh twt odd
+mlr: kmc fxz
+ydw: jpw yjw pha vkt
+ttd: bjl hkc
+rgn: zud dzj
+snu: hvd liz
+vbc: pmb mmx
+ihv: ibk vic
+vgi: idx
+rwa: fkd
+sud: yzb hky
+fhb: jru mrb pps
+fsi: byp svo ezv vsa
+fkd: roj kvk dio zwl vle nsa oxj wyb
+cfy: ffo pvs ytq
+nbu: out
+lru: ipg imm hrs
+ovm: zle hnh
+rsk: mlx
+ooq: csk
+egg: uzb jaf oql qqh
+lry: rae
+zqx: twb xyk rut
+brt: kio cgz
+msc: mmm ekg hud fkd
+kzx: gcv akw hng
+twb: fdf rja sjw
+vhs: sxj
+fdf: vkz iqd
+wew: vgz gls otq
+chj: kpx xiw
+qeu: dtq xsl rfn
+rfn: qey tqb eza fjn
+wzr: you poa xlo
+ghx: xsf jvu aid qeu
+zrm: uej hzq
+zuh: kxh vup sir
+nqd: mrb tbx pps gka
+zih: njx fxz amt opq
+ngw: fzc zyv gbx
+pcz: kvb
+zxv: hng gcv
+lsp: cqq pfr ibh
+pha: poa vkz iqd you
+oea: qbt lws
+kme: air
+nax: vad kpx xiw
+qsa: bcg egg cfg
+cat: ewt wew
+njx: bat fdj nsw chj wyq fam iqk qgq omu kiv ovi dup
+qya: bdb qjj mof
+twt: owm
+ail: amt njx opq
+gtk: out
+oul: xdv
+ryw: qmg ntj
+wqz: wrc ngy
+lit: wzr fdf rja sjw
+ibk: urj pjr cfs ceu mgw eqn cas uqa xbm rzk ktv zti
+rjc: zup rsk
+ych: lky cvz ilm
+hud: roj xuu ibr iua ybi
+tvp: jfy hyh eip qmg ntj
+inv: qjj bdb
+ykn: tak zto qei
+epu: vtc edy rgn
+hzb: vee
+jpw: poa iqd
+urj: ucy gbg pdi ygy bjo
+ybi: awi
+vkz: fmf waa dcd eje gly ihh
+pps: ehx
+qbt: kmc amt
+iua: isx trq res shq
+iel: bth eth
+imj: mmm fkd ekg
+ipg: iew ypy
+fzm: vua
+piy: ned
+nre: mmm ekg hud
+kvk: dac hky
+nrj: out
+thp: hnh tyl ibk zle vic
+iqd: wjs fpr hzb fmf lry dot waa eje lzu mgf
+ljd: out
+zle: jex cas eqn uqa yla rzk ktv wcc zti pjr urj gvj iel zuh rle ceu mgw oha
+zel: wmu ijr
+lzu: rae
+pgl: xlo you vkz poa
+bjt: eip
+foo: pqh vfu drf
+ngy: jac wvw
+tnb: tor ooq pyq gai
+iew: leu whw xas oea
+zwg: wrc ngy etz
+rzk: kxh cnw mjp sir
+fxz: qgq brt huy gav wyq iqk fam omu kiv ovi kmq nax dup bat muk fdj nsw
+wmu: bkk
+cpz: ygr
+ucs: vkz you
+jla: uuf thp
+jaf: akw hng gcv
+xoj: vic tyl zle
+cqq: dlp vap
+ffo: opq kmc amt fxz
+urv: vap dlp qwf
+zfn: dac
+oyv: vic zle tyl
+rbm: pvh gwk jrh
+xlx: rvi
+icb: eep yby
+vub: njx opq
+qwf: gcv akw hng
+esc: fmw
+tix: fxz amt
+wyb: hky
+oql: hng akw
+yla: nkv hgb equ
+zpm: hng gcv
+xba: utf kvh ajc sud zov zwl ybi oxj loe wyb dio nsa uvr vle
+dfp: etz wrc baq
+vap: hng
+rja: vkz iqd poa you xlo
+bsg: fog dpl bip
+sfu: gbx tua zyv
+dzz: vua tnb gzy
+hvd: nmx
+muk: bjt tvp ryw dyt
+ckt: vkz iqd poa
+uuf: ibk zle hnh tyl vic
+air: oyv
+slm: ktn hvd liz
+tqf: onm ius msc
+rae: bip
+roj: zqx ojs oyj qph
+eqn: tqf pty guo
+kzr: ail tix
+ydc: gzy tnb
+iqk: qic ote rbm
+xsl: tqb fjn uwy eza
+qph: xyk lit
+shq: zza mnm zbd ucs
+kcg: out
+pqh: rrp
+xuu: res
+qfl: hsq ifm xsg tab
+gai: oqt azy
+vua: hjl pyq
+rut: rja
+jex: bjo
+bws: qjj
+fog: fgo ykr fhb gda
+hqe: iew dlk ypy
+utf: lym
+qqh: hng akw
+gbg: sev spq foo
+ktv: sir kxh vup cnw mjp
+nfn: gcv hng akw
+qei: ngw
+hrs: iew
+whw: qbt xdb
+rdg: out
+pmb: gcv akw hng
+gcv: ssm nli rhl tuj zfe kvs tgh zqg big lru twn glg ykn qfl jts dyy
+otq: xba mmm
+spq: pqh tod
+gzy: gai ooq hjl
+jvu: dtq rfn
+sfd: uri lkc
+isx: ucs mnm zza zbd
+vbg: nbu viv
+xem: cmi edy
+ifd: dzz rsc fzm
+kmq: rdt
+tgf: jyi
+alt: poa vkz you
+gbx: qzi mlr qrq fyo
+pkw: uqr lsp
+uri: ibh pfr urv
+ucy: sev spq
+dhh: zle hnh tyl vic
+pty: msc ius kdz onm
+fam: joh
+kzt: nzm
+ifm: sxj ext
+ijr: rwa hal bkk
+tak: fft
+onm: fkd ekg
+eje: rby tqj app
+nsa: res shq trq
+xyk: wzr fdf sjw
+qrq: amt
+ykr: pps gka mrb jru
+uwy: vic zle tyl hnh
+ygy: yhs spq
+xsf: rfn dtq xsl
+lvv: uuf thp
+ceu: zel
+vee: ydv xgp
+lws: opq fxz njx kmc
+tbg: bws inv
+fee: kmc fxz njx
+mtz: ezr zfy
+huy: tvp dyt
+ibr: fsi urt awi
+rfr: sjw
+ojs: rut rfr
+twn: imm hqe hrs
+yjw: xlo vkz poa
+vft: kzt ssj eha
+baq: wvw jac yoy
+fyo: amt kmc fxz
+urt: svo byp vsa
+sbp: hng
+kiv: wec kme
+sir: rqx cat zgj pws
+bat: ghx
+pws: syu vtt xlx
+gwk: zne jla lvv gpg
+lvb: hng gcv
+svr: zqw ino ugt
+doq: fqp ljn nrr
+jyi: esc nrr
+gzj: xfz
+hgb: zko
+tua: pjd mlr qrq fyo
+ppv: hud fkd xba
+bwi: epu xem
+ytq: amt kmc opq
+aij: akw
+bfr: xem nnd
+kvs: tab
+rle: pty
+ehx: out
+dio: awi urt fsi
+crj: hck vgi ned
+qth: ekg fkd xba mmm
+xsg: ext
+zgj: vtt wew syu
+hkc: mmx blz
+wqi: gcv akw
+ujv: vft
+owm: njx fxz amt
+ewt: otq rvi gls
+ekw: esc ljn nrr
+zti: guo
+xsr: uej
+cas: eth
+ymz: biy
+kvn: out
+fmw: nbu xdv
+idx: gcv hng
+xbm: zda hgb nkv
+mot: pha jpw
+gka: biw gtk
+hky: pgl olf
+pyq: oqt
+bth: ijr
+dgr: vtc rgn
+pdi: yhs spq
+uvr: hky dac
+rdf: out
+mgf: tqj rby
+cnw: rqx zgj cat
+zbd: iqd xlo
+chp: tyl zle
+cdw: ngw sfu fft
+vrk: jyh rcu
+mlx: vub
+tuj: dgr xem nnd epu
+jrh: gpg lvv
+gvj: brb zel
+azy: out
+qzi: fxz amt njx opq
+jjt: led ttd
+xjo: mot ydw
+yby: xlo you iqd vkz
+amt: brt huy gav
+fhr: vgi ned
+bjo: yhs ria
+cvz: rpg pdn wqi
+dta: uba led rpo
+uqr: ibh pfr urv cqq
+rpr: ibk
+rqx: vtt syu ewt
+imm: iew
+bkk: hud ekg
+hbl: ktn liz
+jru: rdf
+xdb: opq
+jac: zrm txj cst xsr
+hyh: ovm dhh
+awi: svo aoq ezv
+eyt: pkw sfd zhj
+eha: nzm
+oyj: rut xyk lit twb rfr
+syu: otq ppv rvi
+ktn: dfy xll sbp nfn nmx
+cjv: xoj kuy oyv rpr
+zov: zqx ojs oyj qph
+nrr: oul vbg fmw
+rpg: hng
+svo: afw
+dfy: akw
+tza: akw hng
+wjs: dfp wqz zwg
+qgq: bjt
+wnc: hwq mot ydw
+nkv: tbg agm zko
+nhc: jvu xsf aid
+oha: zda kzk equ
+ria: drf tod
+eza: vic
+xfz: lqv
+dfb: wgu fml
+agm: bws qya flm
+cgz: air phg
+bdb: fkd
+nnd: edy rgn vks cmi
+gda: tbx jru gka pps
+omu: kpx
+blz: akw gcv
+dur: zpo rsk
+chb: dfp
+dup: nhc joh
+ibh: zxv
+vwa: jyh nzm rcu
+wec: phg air cjv
+fzc: fyo qzi pjd mlr
+uqa: ucy pdi ygy bjo
+tab: ext gzj ypl
+ajc: ojs oyj qph
+hdi: tyl zle ibk
+mgw: ygy bjo gbg
+lsx: you poa vkz
+zhj: lsp uri lkc
+dyy: hqe imm
+vup: pws
+ius: mmm xba
+rrp: hud fkd xba
+hal: fkd ekg mmm xba
+vad: lwp
+poa: dcd dot fmf waa chb lzu gly kpb ihh fpr wra gmr ejc
+dyt: hyh
+zcc: xgp ydv zfy
+ujp: tyl vic
+oxj: tsp lym
+pjr: vup
+txj: uej kcg hzq
+rlv: fog dpl bip
+pxf: tsp
+sxj: kzr
+tor: oqt
+qmg: hdi ovm ihv
+cfs: cnw vup mjp sir
+yoy: zrm cst txj
+pvh: gpg lvv jla zne
+qic: pvh gwk pcz jrh
+wra: fml tgf
+wia: pvh pcz
+wvw: xsr cst
+phg: kuy rpr
+udx: bcg
+nwk: rpo led ttd uba
+afw: lsx yby
+eth: nkl ijr wmu
+xlo: ktj dfb waa fmf wjs dcd gmr
+zup: sit odd mlx twt
+uba: wtu bjl vbc yzo
+gqb: led uba ttd
+odd: fee
+res: ckt
+ypl: inf
+ypy: sjh whw
+tsp: pnj wnc xjo
+dlp: gcv
+dlk: leu xas whw
+nsw: rdt ote wia rbm
+vsa: afw pdf icb
+dtq: uwy eza qey tqb
+pdn: akw gcv
+ihh: wgu tgf
+drf: imj
+eiw: ydc dzz
+hnh: mgw cfs ceu oha urj pjr wcc rzk yla cas eqn xbm
+ugt: dta crj ebp fhr udx eyt yif ych cpz wcj gqb hbl xth nwk jjt kfd
+vic: zuh zti rle jex yla ceu ktv iel
+fjy: ilm
+trq: zza mnm
+ssm: epu
+kfd: egg zcd cfg
+fml: doq jyi
+edy: cfy
+zza: poa iqd vkz you
+jyh: rdg ljd kvn nrj
+xsm: llk lky
+hjl: oqt csk azy
+mnm: you
+brb: ijr nkl
+aoq: afw pdf icb
+jkz: vic tyl zle ibk
+zto: sfu fft
+mmx: hng akw gcv
+fdj: cgz kio wec
+rvi: hud
+hng: qrc glg bwi dyy kvs cuh big ssm nli
+kvh: ojs oyj
+kmc: wyq huy kiv fam fdj
+big: biy dur rjc
+lym: xjo wnc
+vkt: xlo you vkz iqd
+oqt: out
+you: kpb ihh mgf gly eje chb lry dfb ejc wjs fpr
+zfy: kzt eha
+eip: ovm ujp
+yif: cfg egg zcd bcg
+zwl: qph oyj
+pdf: eep lsx
+xuw: njx kmc fxz
+nkl: rwa hal
+pvf: wnc
+equ: tbg zko
+jts: dgr
+nli: imm hqe
+ovi: ghx joh
+ati: out
+sit: vub
+ndr: shq res isx
+kvb: uuf jkz
+xgp: kzt ssj eha vwa
+nmx: gcv akw
+ino: ebp nwk fhr slm snu eyt ych wcj dta gqb
+kpb: wqz dfp
+app: fzm dzz
+sfh: fee vub
+xll: hng
+vtc: dzj
+liz: dfy xll sbp nfn nmx
+kxh: rqx cat
+gav: dyt ryw bjt
+mrb: gtk ati biw
+ilm: wqi
+ote: gwk pvh
+dac: pgl alt
+ejc: mtz ujv zcc
+biw: out
+glg: biy dur rjc
+bip: fhb gda ykr
+flm: mof qjj qth bdb
+wrc: jac
+kzk: tbg
+qey: ibk
+xiw: lwp nuc kgu chp
+guo: ius
+yzo: pmb
+fft: tua zyv fzc
+kgu: zle
+gpg: jkz thp
+xdv: out
+zfe: rjc biy
+jnc: ifm hsq xsg
+biy: zup rsk zpo
+vle: lym pvf
+dzj: xuw zih ytq pvs
+rhl: cdw zto
+akw: kvs tgh bfr zqg nli jnc ssm tuj rhl zfe cuh qfl dyy bwi ykn qrc big ymz lru twn
+yzb: alt
+hzq: out
+rsc: gzy tnb vua
+ebp: bcg cfg
+dot: rlv bsg rae
+nuc: vic
+mmm: wyb loe nsa vle ybi iua ndr sud zov zfn pxf roj xuu kvh utf
+tgh: vhs tab xsg
+wfk: akw gcv
+byp: afw pdf icb
+inf: ail lqv
+dcd: vee zcc
+etz: yoy
+aid: xsl
+mof: ekg fkd mmm
+kio: cjv phg
+sjh: lws
+mjp: rqx zgj cat
+jfy: hdi ovm ihv
+ssj: nzm
+kdz: fkd mmm
+art: out
+gls: fkd hud xba
+opq: nsw qgq iqk chj
+kpx: chp nuc
+uzb: hng gcv
+vfu: rrp nre imj fxv
+cmi: cfy zud
+wyq: nhc ghx joh
+csk: out
+vgz: ekg mmm xba
+wtu: mmx
+hsq: ypl ext gzj
+ekg: ybi oxj vle roj kvh ajc sud kvk zfn zwl pxf
+fjn: tyl zle ibk vic
+lkc: pfr urv cqq
+fqp: rcf vbg
+cuh: rjc
+zcd: uzb jaf zpm qqh
+fpr: rby ifd eiw app
+zud: pvs ffo xuw
+uej: out
+ktj: tqj eiw rby
+rpo: yzo hkc vbc wtu
+lwp: tyl hnh ibk vic
+fgo: pps jru
+gmr: rae bsg rlv
+zyv: pjd qrq
+ezv: pdf
+ntj: dhh ujp ovm hdi ihv
+rcf: xdv nbu
+joh: xsf aid
+viv: out
+pjd: opq fxz kmc njx
+zda: agm tbg
+zne: jkz uuf
+yhs: vfu drf tod pqh
+xth: zhj sfd pkw
+qrc: cdw
+wcj: zhj
+dpl: fgo nqd gda
+olf: you iqd xlo
+fmf: wqz dfp
+rdt: gwk
+pxu: nkl
+tbx: ati ehx biw rdf gtk
diff --git a/2025/inputs/11_example.txt b/2025/inputs/11_example.txt
new file mode 100644
index 0000000..01e5b43
--- /dev/null
+++ b/2025/inputs/11_example.txt
@@ -0,0 +1,10 @@
+aaa: you hhh
+you: bbb ccc
+bbb: ddd eee
+ccc: ddd eee fff
+ddd: ggg
+eee: out
+fff: out
+ggg: out
+hhh: ccc fff iii
+iii: out