diff --git a/AoC2021.jl b/AoC2021.jl
new file mode 100644
index 0000000..2fcf879
--- /dev/null
+++ b/AoC2021.jl
@@ -0,0 +1,8 @@
+function verify(day, task, case, expresult)
+    taskfun = getfield(Main, Symbol("task", task - 1))
+    filename = "day$(@sprintf "%02d" day)\\data\\case$(@sprintf "%02d" case).txt"
+
+    println("Day $day – Task $task – Case $case")
+    (result = open(taskfun, filename)) |> display
+    @assert result == expresult
+end
\ No newline at end of file
diff --git a/day10/Project.toml b/day10/Project.toml
new file mode 100644
index 0000000..d7da96b
--- /dev/null
+++ b/day10/Project.toml
@@ -0,0 +1,4 @@
+name = "day10"
+uuid = "ae02e071-8bc8-4e06-99ae-6edf1bcf85d9"
+authors = ["HeNine "]
+version = "0.1.0"
diff --git a/day10/data/case00.txt b/day10/data/case00.txt
new file mode 100644
index 0000000..2f182d8
--- /dev/null
+++ b/day10/data/case00.txt
@@ -0,0 +1,10 @@
+[({(<(())[]>[[{[]{<()<>>
+[(()[<>])]({[<{<<[]>>(
+{([(<{}[<>[]}>{[]{[(<()>
+(((({<>}<{<{<>}{[]{[]{}
+[[<[([]))<([[{}[[()]]]
+[{[{({}]{}}([{[{{{}}([]
+{<[[]]>}<{[{[{[]{()[[[]
+[<(<(<(<{}))><([]([]()
+<{([([[(<>()){}]>(<<{{
+<{([{{}}[<[[[<>{}]]]>[]]
\ No newline at end of file
diff --git a/day10/data/case01.txt b/day10/data/case01.txt
new file mode 100644
index 0000000..7eeeaf2
--- /dev/null
+++ b/day10/data/case01.txt
@@ -0,0 +1,106 @@
+<{({(([[<<([[([][])]{([]<>)([]<>)}]<[[[]{}]{()[]}]>)(<<[[]()][[]()]><[<>[]]<[]()>>>{<<<><>><<>[]>>[<[]<>><
+{<[<((<<({([{{{}[]}<<><>>}]<<{[]<>}([]<>)>>)<{(<[]()>{()()})<(()<>){(){}}>}([(()[])<[]>][[[][]]{{}}])
+<{[[{<[[{(<[[({}())[()()]]([<>()](<>()))][(([]<>)([][]))(({}{})[<><>])]><<<[[]<>][{}[]]>([<>{}
+<[[<[([({[{<[({}<>)([]<>)](<<>[]>([]()))><[<[]{}>[<><>]]>}>[{[[({}<>)<()<>>][{{}[]}(()())]][[(<>{}){<>{
+[((<{((([[<<<[<><>]{{}[]}>>(([<><>]<()[]>)<(()<>)>)>([[[{}{}][[][]>]<{<>()}[<>{}]>])]]<{[<[
+([{([[[{(<({<<[]<>>[()()]>{(()[])}})<(<<{}()>(<>>>([(){}]))<[(<>{}){()}]((()[]){()()})>>>)}{
+<{{[(<[<<[[{<(()[])>[[{}()]{{}[]}]}[[(<>())[()()]]{<{}{}>}]](<{[<><>]{{}{}}}<({}[])[<><>]>><{[{}<>](<><>)
+{({<[<([[(({({<>()}{{}{}})})<<<((){})[[]()]><{{}()}[[][]]>>{(<{}{}>{{}()})}>)<<{<[{}[]][{}{}]>([[][]]{
+{[(((((<{[({<{()[]}(()())>{<(){}>{{}()}}}(<[<>()]{[]()}>(<()()>{{}<>})))[<[[{}{}](<>()>]({[]<>
+(([((<{<[((<{{<><>}{[]{}}}><<<<>>[{}]>([[]{}]<<>[]>)>)[[{<{}>{()()}}[[{}[]](()()>]](<<<>{}>[[]
+{<([[{<{([[<([[]<>]({}{})){{{}()}({}[])}>](<(<()()><()[]>)<<[]<>>([]{})>>)]){[{<<[()[]]<<>{}>><({
+<{[[([<<<(<{{(()<>)(()())}([{}<>]((){}))}>)>({({{{()<>}({}<>)}<[[]<>]{<>[]}>})(({<(){}>[<>[]]}<([]{})<[]{}>>)
+(<{<{[[({(<[((<>[]){{}})<(<><>)<[]{}>>]((<<>[]><[]()>)<<{}{}>{(){}}>)>(<[[[]<>]]{{<>{}}{[]()}}>(<{
+{(({{[[{<[((<<()<>>[{}{}]>((()<>){[]()})){{(<>{})[<>[]]}<<<><>>>}){{({<>{}}([]()))[{<><>}{[]
+(([<(([({{<{[{()<>}<{}[]>]}{[[()()][()<>]}[{<>{}}({}{})]}>((<<<>{}>[<>()]>{{[]<>}({}{})}){[<{
+[[{{(<<[[[[<<<<>{}>({}())>[([]<>)(()())]>]<<<{<>()}>[<<>[]>[()()]]>[([[]()]<[][]))<[<>{}]{{}<>
+{[{(((([<[{([(()()){()()}][<(){}>[{}<>)])[(<{}<>>{<>()})({{}<>}[()[]])]}(<({[]<>}<()[]>)({[]<>
+<<([(([{<{<<<[{}[]]((){})>((<>[])(()<>))>{{{<>()}{[]}}{([][])}}>[<{{<>[]}<<>>}({[]<>})>]]({({{<><>
+[{((<{<[[<[{[{{}<>}]{[{}][<>[]]}}[<([]())<()[]>>((<>){[]{}})]]<{(<()<>><{}<>]){[[]<>]({}{})}}({<{}[]>{{}
+<[<{(<[[<(((<({}[])><(<><>)(<>())]){{{()()}(<>())}<[{}()]>})[([[<>[]]{{}[]}]{{{}()}<{}[]>})[[(()<>){<>
+[([{{[<([{[([[()<>]])([[<>][()[]]][[<>[]]<<>[]>])]}{([<<{}()>({})>(<[]()>(<><>))]<<{{}<>}{<>}><(<>
+<<[[([([(<(<<[{}[]]<()[]]><{[]{}}[<>()]>>)>[<<({[][]}<<><>>)[<{}{}>{()<>}]><({<>{}}([]))((
+<({<{(<[({([[{()}(<><>)](<[][]>[{}{}])](([[]<>]<<>{}>))){({<<>{}>[[]{}]}<([][])>)<<(<><>)<[]<>>}>}}((([[()<
+{([<(<[(({[({[(){}]<<>{}>}[[{}{}][{}[]]])]{({[()<>]{()[]}}(<[][]>[()[]])){{{[]{}}(<>[])}[<(){}>(
+<[<[<{[{<[{[<<{}<>>(<>)>]{<({}{}){(){}}>((<>{})[{}<>])}}[<[[<><>]{{}<>}]{<()()>}>{<<[]()>(()())>{{{}<
+(({[[<<[({[{{<()()>}}{<[<>()]>}][(<{[][]}>{[{}()]{[]<>}})<{{<>{}}(()[])}{{[]()}<<>[]>}>]})
+<((<([[({(<{[[(){}]<[][]>]}>({<[()<>](()[])>(([]<>)([]<>))}<{[[]<>]{(){}}}(<()<>>([][]])>))}<{[<[({}
+{({{{[[{{[{(<<(){}>[{}{}]>((()<>)[<>{}]))[<<{}[]><[]>>[{{}{}}(<>[])]]}[(<<(){}>({}{}))((<>{})([]<>)))
+[[(({[{(<({[{<[]()>{()[]}}<(<>())<()()>>]<(({}[]){{}<>])((()<>){{}[]})>}([[({}{})[<>()]][{<><>}]]{([[
+[[{<[([<[((<([[]{}][{}<>])([{}<>])>[([()<>]{{}{}}){{[]()}}])<({{[]()}[[]()]))>)([<<<<>{}><{}()>><(<>
+<<({{{<{[<{<{<[]<>>[[]{}]}[<[]()>{[]{}}]>[[[(){}][<><>]]{(<>[]}({}{})}]}><[[({{}[]}{[]()}){(<>())[()<
+{{(({[[[{<[<(([]())([]{}))([{}{}](()[])}>]>}([<{[[[]()][(){}]]<{<>[]}>}({<()<>><[]<>>})>((([()
+(<(({{(([(({{<{}[]>({}())}([<>[]][{}()])}((<[][]>{()<>}){[[]<>]<{}{}>}))<({{[]<>}([][])}{<[]{}>{<>[]}})
+((([<([([{{{<<<>{}><{}[]>>[[<>[]][{}[]]]}}(([<<>{}>[()[]]][{{}{}}])(<[()()][<><>]>{{<>[]}})}}]<{[[<
+{{(<[<[<[<<[[(<>[])]({<><>}[()()])]>>]>[{{[[{(<>[])([][])}{[[][]]([]())}]>[[[<{}{}>({}())]<{<>
+<[{[[([[{[(<[<{}{}>{(){}}][{[]<>}<()[]]]>(([()<>][[][]]){[<>{}](()[])}))[[<<{}>[<>{}]>[({}{})({}{})]]<([[]{}
+({<<<{<({{{{{[()()]({}())}[[[]{}][<><>])}({<()()><[]()>}({<>()}))}{(((<>()){()()}){<(){}><()[]>})(([{}()]
+([<({[{({(<<{[{}()]}{{{}[]}((){})}>>)<<{[((){})[()]]}<<{[]<>}<<>()>>([<>()][[]<>])>>{<<[<>[]]<[]<>>)<{<
+(<[<<(<[[[[{{({}<>)[{}{}]}<[[]{}]([]<>)>}][<[<<>{}>{[]}][[[]{}](<>())]><<[<>()][(){}]><{[]
+(({[[(([<(([{({}[])[<>{}]}{(<>[])({}{})})<<<{}[]>({}())>[({}<>)<{}()>]>)[<<[[][]]((){})><{{}(
+{[((<([<[{[{<[<><>][()()]><{<>{}}>}[{<[][]>[()<>]}<(<>())<()<>>>]]<<<(<>())<()[]>>>[{{{}[]}}[[{}()]((){
+{{<{({{({[<((({}{}){<>[]}){<{}()>{<>[]}})>(<{<<>{}><[]<>>}>[[{[]<>>{<><>}]{((){})<(){}>}])]}(<{[{{<><>}{[
+(({<[[{[(<(((({}{}){()<>}))<{{[]{}}{{}{}}}<[{}<>][(){}]>>)>[{{(<<><>>([]{}))[((){})<{}[]>]}}(([[<>()]{<>()}]
+[<([[[<[<{<{<{[]{}}{[]{}}>[([]())<<>[]>]}({{[]{}}<[]()>}<({}())(<>{})>)>}[({[[{}[]][{}<>]]})]>]><[
+<{[<<[[<{[[{<<{}[]>[<><>]>}({[[]{}]<{}()>}((()[])))]{[<{()}[[]{}]>]{(({}[])<{}()>)<(<>())[()<>]
+[[([[{[[(([{[[<>()]{<>()}]({(){}}({}{}))}[<[<><>]([]())>(<[]()><{}[]>)]]{(<<<><>>[[]{}]>(<[][]>((){}))
+{(<<[[{[{{(<<<{}[]>(<>[])>({[]{}}([]{}))>[{<<>()>[[]<>]]([{}[]])])}[[{(<<><>>[()()])<<<><>>>}([<<>
+([((<(<[(<{((<{}{}>{<><>})){{(()[])[{}[]]}}}{[[[(){}][<><>]]]({<()<>>{{}[]}}<[()()]{()[]}>)}>[<{(<{}
+[(<[([[({({<[{<>()}([]<>)][(<><>)<()[]>]>})[{([(())({}[])][{[]<>}<()<>>])}({<[{}{}](()())><({}())[<>[]
+([(<<[<{<{((<(<>[])({}<>)>{{()()}<<>{}>}))<{[[()[]][()[]]][({}[])<{}()>]}{<({})><{[][]}{{}<>}>}>}<<<({(){}}
+[(<{(([({<{{(<[]<>>({}()))}}[<[[{}[]][[]]]>[({[]<>}(<>{}))]]>})]<([(<([[()()][[][]]]<((){}
+((({([(<<{{<<({}())(())>([<>()]<()()>)>}}<[(<{{}[]}<()<>>><({}{}){(){}}>)][(({()<>}([]()))([()]))({{{}()}
+{<(({[<([{[({([][])[[]{}]}<({}<>)<<>()>>)<<{<>()}{[]<>}>{{{}}{[]()}}>]}])<<{<(([[]{}]<<>[]>)){<<[]<>>><<()[
+[{<(<<<((<<<{[()<>]{[]<>}}>[[<{}{}>[()[]]]<(<><>)[()[]]>]>{[[[[]()][<>[]]]]({(<>}{[]{}}})}>){({
+<<[((<<[{{[(<[<>()]><{{}[]}{<>{}}>){[(()[])([]())][[(){}][{}[]]]}]([<[[][]]{(){}}><<{}{}>{<>{}}>][[
+{<<{<<{<({[[([<>{}])[{[]<>}{{}[]}]][[<()<>>[<>{}]]]]<([{[]()}({}{})]({[]()}{<>()})){[({}<>)[[]{}
+{<<[{((([<([[<[]()><<><>>][{()<>}<[][]>]]{<[{}[]][()[]]>[{<>{}>{[]}]}){[([[]{}]<()[]>)[[<>()][{}[]]
+({{{{<([[((({{{}{}}<()[]>}{<()<>>{{}<>}})(<({}{})>({<>{}}[[]()]))){(<<<><>><()[]>>[{()()}{[]<>}
+({<{[[{({{[<[{[][]}<[][]>]{(<><>)}>([[<>{}][<>{}]]({[]{}}<<>[]>))]}{[({[[]]{()[]}}{(<>{})[()()]})(<{(
+[{<<<[(<(<{((([]{}))[{<>()}[()[]]]){{<{}{}>}[<[]<>>{<>{}}]}}<(<[<>[]][()()]>)<([{}()]{{}[]})
+{{(([[([((<([[<><>]])>({[{()<>}<[]{}>]}<{[()()]<{}>}(<{}<>>({}{}))>))[{{([()()]<{}<>>){(<>{})(
+([(<{[[{<{{<{([]())(<>[])}{{[]<>}{()<>}}>{{{()}}[<[]{}><{}<>>]}}<{[{()()}]{{<>[]}[<><>]}}<<{<>(
+([[{[{[{<<(<{<{}{}>{[]}}{[{}{}]{()[]}}>[{({}[])}<[()[]]>])>>[(<<({<>{}}{[]{}})>>(<[([]()){()<>}]((()())([]
+(({<({<([(({<<<>()>([]())>{<()[]>{[]<>}}}(<{{}<>}[()()]>({{}<>}[{}()]))))]){{<[{[(<>[]){()
+([[(<{[[{<[<(<[]()>[{}[]]){[<><>]{<>[]}}>{{([]()){[]{}}}<((){})([]<>)>}]<<<{{}[]}[()]>(<{}><[][]>)>>>}
+{{(<[{[([<<<[<{}<>>(<>{})]<({}[])[<>[]]>>({<{}{}><[]{}>}<<[]><(){}>>)>>(((({()()}[[]{}]))<[{[]<>)<[]()>]
+(({{<<[{([[({[[]{}]{()<>}}[(<><>)[()()]])[<[<>[]]><([]{})[[][]]>]](<((<><>)<<>()>)[([][])((){})]>[(
+((<<([[<{[{({<(){}><[][]>}{(()[])({}[])})({[{}()]({}{})}(<(){}>(<><>)))}{{[{()<>}<{}{}>][{[]{}}(()
+<{(((([<[((({{{}<>}[[]<>]}<[{}<>]>)[<({}{})>{{[]()}<{}()>}])<([<<>>(<><>)]((()())(<>{})))>){(({(
+<{{<<{{{[({{[<()[]>(()[])]}<<[[]<>][[]]>>}[<[({})<<>[]>][[[]]([][])]>])]}}(<({[[<[(){}]>{<[]{}>}]{(({
+[([[(({([{{({{()}[{}<>]}{({}<>){{}()}}]}}{[<<({}())<(){}>>[{()[]}([]{})]>]{<<{{}()}(<>[])>{[(
+[{[{[([<<((<<{()<>}<<>()>>[{[]{}}{{}[]}]>[[{[][]}{{}}]])(([((){})(()())]{[(){}]{()}})))}{(<<<<<><>>({}[]
+<[{({[({[({{(<[]()>{{}<>}){{{}<>}[(){}]}}(([{}()]<[][]>)[[<>]({}{})])}<<[(<>)({})]<<()[]><
+[((([<(({<<({{{}()}({}<>)}({()[]}[{}{}]))>{[{(<>[])}{(<>[])<{}[]>}]{<[<><>][()[]]>}}>({<{<<>()><<><>>}([{}[]]
+{({((<<([((<[[()[]]{[][]}]<{(){}}{<>{}}>>({[(){}][<>]})))(<(({<>[]}<(){}>)(<()[]><{}()>))>)]){
+<{<[<(<{<[({{{{}<>}<<>{}>}{[[]()][{}{}]}}[({<><>}{<>{}})[[{}()]{[]()}]])({{<[])(<>[])}})](<<[[<><>]](<{}{}>
+[([[[{[((<<(<<()()>>)><<{([]()){<>{}}}<{[]{}}<()()>>>[(<<><>>[()[]]){((){})([]{})}]>>({[<[<><>]{<><
+<{{({{{[<{[{{{()<>}[<><>]}[(()[]){[]{}}]}(<{{}[]}[<>[]]><{{}{}}<{}[]>>)]{(({(){}}<<>{}>)[<<><>>[{}
+[[([[{[({[{[({{}[]}{()[]})[<()()>{{}{}}]][(([]<>)<[][]>)[<{}{}><{}()>]]}][<([([][]){()()}][[{}{}]{()<
+{(<<(((<((((<{()<>}<<>[]>)[<[][]>[{}()]]){[[[]<>]<(){}>][<()<>>{{}<>}]})))<[{{[{{}{}}<[]<>>]}}(
+{[(<{[<{{({[{[<><>](<>{})}{({}[])(<>{})}]}({<({}[])<[]<>>>(({}[]))}[<<()><<>>}[{()[]}{[][]}]])){[({<<>()>(
+<([{[(<(<<([((()())<{}{}>)]<{(<>())(<>()]}{[()<>](<>())}>)<[[<[][]>]{{()}<<><>>}](({()()}[[
+<[<[<{{{[{((<(()()){{}<>)><[[]()](()<>)>))({[[<>{}]{{}()}]({()<>}(()[]))})}]}([{((({{}()}[()<
+[{([({[<(<{[{[<>[]][<>()]}([[]{}](()()))){{[()()]<(){}>}({()[]}<[]()>)}}<{[(<>[]){()<>}][[()<>]{()[]}]}{<(<>
+{((<(<({{([{[([]<>){[]<>}](<[]<>>[[]<>])}{{<[][]><()[]>}({()<>}<<>{}>)}]<[<[<>()]([]{})><{{}<>}<{}<>>>][(
+{<<([<(<{[[{{{<>[]}[[]<>]}{[{}[]]]}{<[(){}]>{[{}()]{[]<>}}}](<{[[]<>]{<>[]}}<<()<>>[[]()]>>)]<[{{<{}>[{}]}<(
+[[{{{<{[{({<<<[]{}>[()<>]><[[]<>]([]<>)>><{<<>()>[<>{}]}>}((<[{}{}]{[]}]{<[]<>>{<>{}}})[([<>(
+[[{<<{{[(([[[{()[]}][[()[]]<[]>]]({{{}}})][({([][])[{}{}]}<[(){}]<()[]>>){<{[]{}}[(){}]><{{}{}}<<>()>]}]))<<
+[(({[<<{<({<([<><>])[{<>()>{{}[]}]>((<()<>><{}<>>)[{[][]}([]{})])})<{{([[]<>]<{}<>>)([()[]]{()()}
+[([(({(<[<[<((<>{})[[]<>]){[<><>]({}[]>}>]>]>)}[(({(<<[{(){}}[()[]]]>[<(<>{}){{}{}}>[[()<>][()]]]>)
+{<{{<({<{((<{({})<<>{}>}((()){()<>})>))}((<{((()[]){{}[]})[<<>>[[]<>]]}(([<>](()<>)))><{{{<>()}((){}}}((
+<[<{<((({{[<{{[][]}}<([]<>)(<>{})>>]}[(([{()()}{<>()}])[<[()[]][()[]]>]){<<[<>()](<>{})>{{(){}}(<>
+(([{([{[<(<(((()<>))[(())(<>{})])([[{}<>]{{}[]}][{<><>}[{}{}]])>[(([()[]]<[][]>)[{{}[]}(()[])])(([{}{}]
+{<(<<{<[{<{<<<<>[]>[[]<>]){[[]()][<><>]}>({(<><>)(()<>)})}>[<([{{}{}}<[]<>>])({{[]<>}({}[])})>]}{<<[(
+<{([({{{<{[{(([]())<<><>>)<[()()]((){})>}]}(<{(<(){}>(<>()))}([[()[]][(){}]](<<>{}>[{}()])}>)>([{<(
+((([{<<[{{[(<<[]<>>(<>())>{({}{})<{}[]>})[[<()()>[<>[]]][<{}[]>(()())]]]}}]>>)]{{{{[[{[[[([]<>){
+({(<{{({[[{<<(()[])[()]>[{<><>}{<>[]}]>{<{<><>}{()[]}>{[{}()]{[][]}}}}{<<{[]<>}(<><>)>{{[]{}}[
+(<[{{(([<{{(<[<>()]((){})>{<{}[]>({}())})}}>][<[{{([{}[]])<([]<>)<<>{}>>}}{<({[][]}(()()))(<<>()>{
+(<<{{{((<{({<<{}()><{}{}>><<()[]>[<>[]]>>(<[(){}]([]<>)>[({}<>)]))(({{[]<>}<()<>>}[<()[]>(()[])]){<[
+<[(((<({([({{[[]()]{[]()}}([{}()]<[]<>>)}[[<()[]>{{}{}}]([<>]<<>()>)]){[((()<>){<>[]}){[{}[]){[
+(({[[({{{[{{({(){}}{{}[]})<({}[])([]<>)>}[[(<>{})]<([]()){{}()}>]}[{<{[]<>}<()()>>([{}<>]<{
+<[({{[<[{({[({[]<>}{{}[]})[{[][]}{[][]}]][[<{}[]>{[]()}]([()[]]({}<>))]}{<{[{}<>]<[]()>}<<[]()>[<>{}]>><((
+[{[{<{{[<<[[<<{}<>>>][{{{}[]}({}())}]]([{<<><>>({}{})}{{[]<>}}]{{{[]()}([]<>)}})><({{<[][]>}}){<{{()><()>}>[<
+{{({([<({(<[({{}{}}<[]{}>)]>[(((<>()){<>()]))[<({}[])(<>{})>{<<><>>{[]()}}]]){{[<(()[])<()<>>>(<()<>>)]([<{}
+[({[<(<<[{<({<{}()>{{}()}})({({})<()()>}[{[]<>}[{}{}]})><[(({}{}))(((){})[[][]])]>}<{([<[]<>>]<[{}[]]((
+[<{{{<<(<[[{<([][]){<>}>}{<[[]]{[]{}}><{<>{}}>}]<<{([]())[<>[]]}><(([]{}){[]<>})[(<>())({}<>}]>>](
\ No newline at end of file
diff --git a/day10/src/day10.jl b/day10/src/day10.jl
new file mode 100644
index 0000000..ee35231
--- /dev/null
+++ b/day10/src/day10.jl
@@ -0,0 +1,60 @@
+using Printf
+using Statistics
+
+include("../../AoC2021.jl")
+
+##
+
+function validateline(line)
+    stack = []
+
+    opening = ["(", "[", "{", "<"]
+    closing = [")", "]", "}", ">"]
+
+    for (i, char) in enumerate(split(line, ""))
+        if char ∈ ["(", "[", "{", "<"]
+            push!(stack, char)
+        elseif char ∈ [")", "]", "}", ">"]
+            if stack[end] != opening[closing.==char][1]
+                return (i, char, stack)
+            else
+                pop!(stack)
+            end
+        end
+    end
+
+    (missing, missing, stack)
+end
+
+##
+
+function task0(file)
+
+    map(eachline(file)) do line
+        (_, char, _) = validateline(line)
+        ([")", "]", "}", ">"] .== char)' * [3, 57, 1197, 25137]
+    end |> skipmissing |> sum
+end
+
+##
+
+verify(10, 1, 0, 26397)
+verify(10, 1, 1, 316851)
+
+##
+
+function task1(file)
+    map(eachline(file)) do line
+        (_, char, stack) = validateline(line)
+        if char !== missing
+            missing
+        else
+            foldr((c, x) -> 5x + (["(", "[", "{", "<"] .== c)' * collect(1:4), stack, init = 0)
+        end
+    end |> skipmissing |> median |> Base.Fix1(convert, Int)
+end
+
+##
+
+verify(10, 2, 0, 288957)
+verify(10, 2, 1, 2182912364)