aoc-racket/2021/10.rktd

{([[[(<<[{[[[[(){}][()]][({}())]]]<{((<>[]){[]<>})({()()}(<>[]))}<{{{}()}{[]()}}>>})[<(<[[<><>][{}{
([(<(((<[({{({(){}}<{}()>)((<>{})[{}<>})}}[{[(<>())[[]]]{{[][]}(<><>)}}{<<{}()>([]())>([<>][{}])}])](<[{[
{{[[<[<(<<<{((<>[])([]<>))(<{}><()[]>)}[(((){}){<>[]})<{(){}}<<>[]>>]>{[{{<>{}}<()<>>}<<<>[]>([]<>)>][
<[{<(({([[([({{}[]}{<><>})<<[]{}>>]<<<{}{}>((){})><{{}()}<{}[]>>>)](([<([]{})<{}<>>>(<[][]>{()()})
{{<(([<[[{<{({{}<>}({}()))<[<>[]](<>[])>}><[(((){})){[()]<<>[]>}][{{<><>}(<>{})}<<()[]>({}())>]>}<[{[(()<>)
[<{{{({{[<([<{<><>}{<>{}}><<[][]>[{}<>]>]({<[]{}>[[]{}]}{([]())([][])})){<{[[][]]([]())}>([[[
{[<[<<([[<(<<<<>>({})>><({(){}}(<>{}))[{()()}(()[])]>}[<({[]})<[()[]](<>{})>>[<({}{})[()<>]><{(){}}>]]>
[(<({{<[{<(<((<><>)<[]<>>)({<><>}<<>()>)><<<()<>>[()()]>{<<>{}>[()<>]}>){{[([]{})<<><>>]([<
<<{{<{<{([{(<{<><>}>((()[])<<>{}>))({<{}>}<[[]()][<><>]>)}<{([[]()]{<>{}})}{(<<>()>{<>{}})[{<><>}{<><>}]}>]
{(<{<({{([[{<({})[()()]><[{}<>][{}[]]>}<<<[]{}>[<>()]>({{}{}}[{}[]])>]<({[[][]]({}())}[(()[]](<
<[<{[<<[(((<([()()]<()()>]([()[]][{}{}])>)[[[{<>}[<>[]]]][(<()()><<>>)<<{}{}>{<>}>]])([(<({}<>)[()()]>
(<<{{([<[<[<[{[]()}[{}<>]]<(<>[])[{}]>><[{()[]}[()[]]]<([]<>)(()())>>]{{{{()<>}{()()}}[(<><
<[([(<[[[(<[(<{}()>{()()})<<()[]>{(){}}>]><<({[]<>}<{}{}>)[{[][]}{[]{}}]>{<{()()}(()[])>{[<><>
[[([[({{{[[(<<()()>[<>[]]>)<[<<>{}>]([[]()][(){}])>]<(<{()<>}[[][]]>(([]{})[[]()]))[<({}[])
<<{[({<[[[[[{<<>()>{<>{}}}[<()()>]](<<{}<>>{{}<>]><[{}<>]<()<>>>)][((<[]{}>[[]])<{{}()}>)[((<>{}))<<<>{}>(
[[<[[<<(({{<({[]<>}([][]))>{([[]()]{{}<>}){[[]{}][()<>]}}}({{({}()}[[][]]}(((){}){<>})}(<[{}<>]{()()}>
{[{<[[(({<({[{()[]}[[][]]]}(({<><>}<{}[]>)))>}{[{(<{[]{}}{{}[]}>{<<><>>})}<{{[[][]]{<>()>}}<{
{[({<{<{[[([[<()<>}{[]<>}][<<>[]>([])]])]([({{[]()}({}())}([<>()](<><>)))])]{{<[<<[]<>>(()())>(<<>()>{<>
({([<({((<({<<()<>>[(){}]>[(<>{}){<>[]}]}){([{{}[]}])([({}()){<><>}]{[<><>]([]())))}><<[([{}[]])](
<{[{<{<<[<<<[(()<>){[][]}]([()<>]({}{}))>{(<{}{}>[<>{}])[{{}()}[(){}]]}><({<[]<>>[<>{}]}{([]<>)<[]{})})<([{}(
<[<<(({<[{{(<[[]<>]<<>()>>([{}<>]{[]()}))}{<(([]<>)<()<>>)[({}[])<[]{}>]><<<{}[]>{{}<>}>({<>[]}[(){}])>}}<(
[[[[[[(((<{<{(()())<<>{}>}>(<[<><>]({}[])})}{{<[()<>]<[]{}>>[{{}<>}[[]()]]}({<<>[]>}[<{}<>
[(({{<{[<[[(<(()())<<>()>>[<<><>><()()>])(<[{}()]><{[]()}<{}{}>>)][<[({}())<{}<>>][({}[])(()[])]>(((
(([<({{<{{[<<{[]()>(<>{})>[[{}]{{}{}}]>{<<[]{}>>[([][])[<><>]]}]<<[<<>[]>({}<>)]({<>[]}<{}{}>)>[{<{}<>>{[]()}
{(<<[{<<{({(<(<>{})(()())><(<>[]){[]<>}>){[(<>[]){[]()}]{[<>()][{}<>]]}}{([[{}()]]((<><>)))[([{}()]([]()))
[{({[[{{[<<{{[{}<>][<>]}([(){}]{<><>})}><(<[()[]][{}{}]><{[]{}}({})>)(<({}[])<()()>>{<{}{}>{[
([(({{<[<(([({{}<>}[[][]])<({}[]){{}()}>]{[[{}[]]][((){})]})<[{{{}<>}([]{})}{{[]<>}}]>)[{{<([]())({})>
<{{{<<(<{<(<{{<>()}}{({}<>)}>)>}((<{[<{}{}>([]<>)]<<[]()>[{}()]>}<{[<><>]<[]{}>}{{(){}}[[]()]}>>[({(()<>)<{}
((<[{<<{{{([[[[][]](<>[])]]{<({}[])([][])]<{{}{}}{()[]}>})}[[{<{<>[]}{<>{}}>}]]}{<[[((()<>)<()[]>){<()>({}[]
({[[{<{{<<([(<[]<>>{<>{}})<{()[]}(<>())>])<[{[<><>]({}{})}][<({}())><{()<>}(<>())>]>>>{{(([
<((<<(<(<<{{{[{}]<()<>>}{[[]<>]{<><>}}}<[[<>{}]{()()}][<()()>{[][]}]>}{[{[{}()][{}{}]}(<{}()>[{}<>])]}>>
(([<({<[[(<(<([]())({}<>)>([{}()]{<>[]}))<{{{}{}}([]{})}<({}{})<{}<>>>>>[{{<<>[]><<>{}>}({{}<>})}{({[]()}(()<
{[((<({[([(([{(){}}{{}()}][<[]()>{(){}}])[[[{}[]]{{}<>}]<{[]{}}>]){(<[<><>][[][]]>)[{{<>{}}((){})>[([]())[
[[<[<{({[({{([()<>]<()()>)}[<<[]()>>]}((({()()})(<{}>[<>()]))[(({}{}){[]}>(([][])<()()>)]))[{<[<[
[<<([((<<(([[({}{})((){})]<({}[])[{}{}]>]<{{<><>}<[]>}>)[<{{<>()}<()()>}{<<>{}>[[]()]}>[(([][])
{(<(<[[((<([{<[][]><()>}[[<>{}]]]<<((){}){[]())>[<()<>>(<>[])]>)<{<[[]][<>{}]>({<><>}[<>()])}({{{
(<{({({<[[((<<{}<>><<>()>>({{}}<<>[])))[<<{}[]><<><>>>{{[]{}}(())}])[<[([]())<<>{}>]>[[[<><
<[{[[{[({{{([<()()><<>[]>])([([]{})(<>())]{([]<>){()[]}})}<{({{}<>}{[]})([()()])}<[[[]<>><<>{}>]<[()()]<(){}
<<[<[{{({(({(<[]()>({}{}))([{}[]][[]()])}{{(()[]){<><>}}([<><>]{{}})})[{[[{}{}]({}())]{<<>{}
{{{[[[[[<(<<{(()[]){()<>}}<<(){}>(()())>>({(()[])}<<[][]>[<>()]>)>)[{[<(<>())>{<(){}>[{}{}]}]
(([<[[{(([([<<<>{}>((){})>[({}{})<()<>>]]([((){})({}())]])[[{[()()][()[]]}([[][]](<>()))][<{()<
([<{{[[{<{[({<()[]>{[]<>}}([()<>]<[]()>))]}>{[<({({}{})})>{{<[<>{}][()<>]>({[]}{[]<>})}{<[[]{}](<>())
[{<<<{{((<{<<{[]()}<<>{}>>{((){}}{()()}}>}{[((()<>){<>})]({{()()}{(){}}}(<<>()>))}><[<{<{}><(
(((<<<<{((((<{<>[]}{<>()}>)(((<>{})(<><>))))))}><<{<(<<<[]{}><[]>><{[]()}{[]())>>{{<{}<>>}{{
{{[{<(({[[[<[[(){}]]><<[{}{}]({}())>{{[][]}[()()]}>]<{<[<>{}][<>{}]>[(()[])<()[]>]}[{<{}<>>({
{[{{[<[(((([{{{}{}}}({<>{}}[[][]])]){[<([]<>)([][])><{()<>}([]())>](<({}<>)<()>>(<()[]>{{}()}))
{{[(<<[<{<{[[<<><>>[()()]]]<(([]<>))<[[]{}]<[]>>>}>}>{{[<<<[()()]({}())>{<{}()>(<>[])}>([[(){}]<{}[]>]({(
[[[<<(<[{<[[<{<>[]}{{}[]}>]{({<>{}}[<>]]<({}{})[<><>]>}]((([{}{}][{}<>]))[({<>()}(<>{}))])
{{((<<[({<<<{[(){}]({}())}([<>{}]<(){}>)>([(()<>)<{}[]>]<<[]{}><<>{}>>)>[[<{<>}((){})>[{()[]}<{}<>>]](
((<<<<(<[{((<[[]{}](<><>)>{(()<>){()[]}}))}{<({(()())[(){}]}[[[]<>]<{}<>>])<([()[]])[{{}{}}{<><>}]>]}][<[{{
[[({<{{([([<{<<>()><()()>}>((<{}<>>{<>{}})[(()<>)[{}[]]])])[{{(([]())[<><>])({<>[]}(<>{}))}[[<[]><<>[]>]({[
[[(<(<[[(<{(({<>()}(<>[])){<<>[]>{()}}){({<>()}((){}))<<{}[]>[<><>]>}}{({<<>[]>[{}<>]})[[{(
({[<({<{<(<({([]<>){{}[]}}<({}{})[{}{}]>){{([]<>){(){}}}(<[]<>>{<><>})}><[[(<>())]{([]<>)}
{{[[[<{<(<{[(({}[])({}{}))<<()<>>>][<[{}{}]{()[]}>(<[]<>>{<><>})]}<{[<<>()>]<([]())<<>()>>}>>)
(({{{<(([[<(<((){})><[[]{}][{}()]>)<{[{}{}]}<(<>[])>>>]])({{{<[<()<>>{()<>}]>([<<>{}>(()())]<<<>{}>{[]}
{{[[[[({<{[{<[()<>]<<><>>>({<>()}<<>{}>)}(({[]<>}([]))<<<><>>[[]<>]>)]<(<<()()>([]<>>>{({}{}){()()}})[[[<><
[<<{[[([(<{[{{[]()}{[][]}}{{[]()}{(){}}}]{{[{}<>]([]<>)}(<{}()><<>()>)}}<[<{{}<>}<[]<>>><[[]{}]([]{})>][{({
[[[<<(({(<<((<{}<>><(){}>)<([]<>)(()[])>)[((<>())<(){}>){{(){}}{<>[]}}]><<({(){}}{{}<>})>{[<[]{}><[]{}>](<()
({({{<[<<<[{{<{}[]>[(){}]}{(<>[]){{}}}}]{[[{[][]}{[]<>}]{(())([]{})}](<({}{})(()())><{<>()}>)}>>>]([({
<[(((<{<{[<{{{[]<>}{<><>}}{([][])[<>()]}][[[()<>]<{}[]>](({}<>)<[]()>)]>][(<{{{}[]}((){})}{{<>{}}({}()
{<{[({<<(<[<([<>]<[]()>)<({}()){()[]}>>([{()[]}[{}{}]])]>(([{[[]<>][[]<>]}[[<>()]<<>()>]>(((()[]){<>{}}){
<(({<{[(<([(<{[]{}}{[]()}>){{(<><>){[][]}}[{{}()}<[][]>]}])>(<{{{[()<>][()<>]}({{}[]}[[]{}])}}(<{{[]{}
{<[<[{{<<<([[[{}[]]{<>[]}](<<>[]>[()()])][(([]<>)]])>([[<{()}{<><>}>[(<>[])<{}()>]]]{<{<[]{}>[[]
([{[[<<<<{<[({[]{}}(<>()))[<{}<>>[[]{}]]](([{}<>]){{[]()}[<>[]]})>[{(([][])[{}[]]){(<><>)(<>[])}}(<{()<>}
<<(([<{[((<[(<(){}>[<><>])[<<>[]><()())]]{<{()[]}(()<>)>}>)[<<{<(){}><{}()>}{[{}<>]<(){}>}>><[<{<>[]}{[][
(<<[<{<(<<({<([]{}){[][]}>{<[][]>{<>{}}}}[(([]())<<><>>){<{}><<>[]>}])(<{[<>[]]}>{<[{}<>}{<>{}}><{<><>}{()[
[[[[{<[{[<(<[(()())<{}[]>][(()())<()>]><{{()()}[<>{}]}[({}()><[]<>>]>)<{{[[]<>]<[][]>}{[<><>]
{{<(({{<{(<([<[][]>(()[])])<<{<><>}<[]<>>><(<>{})>>><{[[[]{}]{<>[]}](<<>{}>(<>[]))}[[<()<>><()<>>]<{()<
<[({<[[[(<{[(<{}()><(){}>)(<[][]><<>{}>)]<<{{}[]}<{}()>>[(<>())<<><>>]>>{<[([]{})[(){}]]{[(
[{<<<({<[[[<{{<>{}}<()<>>}{[[]()][(){}]}>{(({}[])<[]{}>){<()>(()[])}}]<{<({}<>)<{}[]>>[<{}{}><<><>
{<<[(<<<(<[<<{<><>}>({<>()}(()[]))>[([<><>][[]{}])(([]<>))]]>)>[({[<([[][]]({}))<((){}){[]<>}]>[[
([<{<(<<{({<{<(){}>({}<>)}}{<[{}()][()<>]>{<[]<>>{<>[]}}}}<({[{}{}](<>[])}(<[][]>[{}<>]))<
{([<<<<{[<<[[<{}{}><[][]>]<{{}()}[()[]]>]<[(()[]){<>[]}][[[]()][()<>>]>>(<[{<>()}(<><>)]{<<>{}>{
[[([(([[[<[((<()()>)([[]{}]<[]()>))]><{{[[[]{}]([]{})][(()<>)<{}<>>]}([{()<>}]{[<>()][{}[]]})}
<<{<[<<<({{(<<[]>([])>{<{}<>><<><>>}){<<()<>><()<>>><(<>[])<{}<>>}}}{([{[]<>}{<>{}}](<()()>[{}{}]))<{<[]>
[{{(([{[<{<{{<<><>><{}[]>}}{<(<>{}){[]}>[([]{})[[]{}]]}>(({[{}]<()[]>}))}><<[{(<{}[]><[][]>)
[[[<[<[{{[<[{([]())[()[]]}{<{}<>>[()[]]}]<<{[][]}<()[]>>(<{}<>>{[]{}})>>{<<<{}()>><([]<>)[<>()]>>{{(
{{{([{({[((((([][])[[]()])[(<><>)[()[]]])[[[<>[]]{{}<>}]<[{}[]]([][])>]){[[[[][]]<()<>>](<{}<>><{}{}>
<<<[({{(<((<<{{}()]<()>>(<(){}><<>{}>)>(<{<>()}<[][]>><{<><>}{[]()}>))[(<([][])[<><>]>(<()()>{{}
<[(([[(([[({[[[]()]{()()}](<<>{}>)}){<{{<>[]}{{}{}}}{<[]()>[{}{}]}][(<()[]>[<>[]])((<>{}))]}]{[<<<<>
({{[{<[{([[({[(){}]}[{[]{}}<(){}>])<<({})[[]()]>>]<(({(){}}<[]>)<[<>{}}(<>())>)>])}<<<<[[[[]<>][{}()]]
{{{[[([<{({{{<(){}><{}()>}([()()]<<>[]>)}<<[<>()]{{}<>}><<<><>>>>})([(<(()[])({}<>)>([{}<>](<>[]))){(<<>>
<([([[<{{({{[[<>[]]({}[])]}(<({}())><[<>{}]>)}{[(<{}[]>(<>[]))([[]{}]{[]})]({([][])(<>())})}
[({({{[{<{{(([{}]){<{}[]>([][])})({[[][]]<<>[]>}[<()<>><[]>])}<<<<{}{}>{[]()}>({[][]}[()()])>({([][])[<>{}]}[
({<{(<([<[{<{<<>[]>({}{}>}([()<>]<[]<>>)>({{(){}}<<><>>}[({}{})])}]><<[(<<<>{}>([]())>)[[<[]<>>(
<[{<{<<<({[([({}<>){()()}][<()()>(<><>)]){<{()[]}<<>[]>>{{{}()}[<>[]]}}](((<[]()>{<>()})(({}<>)([]{})))({(
<<{<[[[<[<[[({()()}({}[]))[<()()>[()<>]]]]>][{[<<({}<>)[[][]]>{{{}[]}<()[]>)>]<{{[()[]][[]()]}}{<[
<{<{({({[{<{[{()<>}]<<<><>><[]<>>>}[{<[]><(){}>}<{[]{}}(()<>)>]><{<{{}()}{(){}}>{<()<>>{[]()}}}((([]<>)<<>
{(({[([(((<<([()()]<<>[]>)[<<>()>(<>{})]>[<<<><>><()>>]>[((<()()>((){})))[[<()<>><()()>)({{}[]}
<[<[<{<[{[[([[()()]<{}<>>]){[[{}[]][<>()]]{[[]{}][()<>]}}]]<[{((<>())[[][]]>}([[()<>]<[][]>])](({[
((<<[[{<({[([{<><>}[<>{}]]){(([]{}){(){}})}](<({{}()}<()<>>)({[]()}[[][]))>{{{{}()}[[][]]}<(<>{}){<>[]}>}
<{{{[([({{[(<<[]<>>[{}<>]><<[]{}>(())>)<[[<>{}]<{}<>>]<{()}<{}{}>>>]}{{[<(<>{})<[]()>><[(){}]>][{([]())}[<
[{<[<(<<{({[[<[]<>><()()>]([()()]<<>{}>)]}{(<{[]()}([]<>)><{()[]}>){<<[]()><{}<>>>({()}<<>[]>)}})}{
[{(({[{[{(<[(<[]{}>(<><>))]<[{()}({}())]>><<[({}[]){<><>}](<[][]>[()[]])>[[([][])([]<>)](([]{}])]>)}]<[<[
<({[([(<(((({(<>())<{}[]>}[(<>[]){()[]}]))){[([([]{})(<>()]]([()()][{}<>]))<<{{}}(<>[])>{{()
((({{({<{<({[(<>[]){()()}]([{}[]][{}{}])})(<<{[]{}}>{<[]<>>{()[]}}>)><{{{{{}()}}{[{}[]]<<>[]>}
(<[<<[([[{<[<({}()){()}>(<(){}><<><>>)]>{{([()[]]<<>()>)(<[]<>>)}{[{<>[]}[<>()]](<<>()><()[]
((<<({<((<(<({<><>}({}<>))({{}{}}(<>()))>((([]()){(){}})[(()())(()())]>)>){{<([{<>()}(<><>)]<{<>()
(({(<[({({([<{[]()}<<>()>>{(()<>)[[]()]}]{{[()()]((){})}{[{}<>]{(){}}}})}<<<(<()()>[{}{}])<([]{}){{}[]
{({[[{([[[<((<(){}>{{}()})[(<>{})])([[<>[]]<()[]>][(()())<[]{}>]>>]((({[{}<>]<{}{}>})({<{}[]>}{(<>
[[(({<<{[(<<(([][]){{}<>}){[{}[]]({}[])}>(({<><>})<(()<>)[<>()]})>{({[[]{}]((){})}[([]())])})(({([[][]]
<[<{[<<<{[{(<[<>[]]>{{(){}}[[]()]})}[<{[{}{}]}><(<{}()]{{}{}}){({}[])}>]]}>[({{(<({}[])({}<>)>[{{}<>}])}{