Day 10 solution

README.md

@@ -102,3 +102,12 @@ The solution for "nine" is:
 The sum of the risk level of low points is 439
 The product of the three largest basins is 900900
 ```
+
+### Day ten
+
+```sh
+$ ./aoc2021 --ten
+The solution for "ten" is:
+The syntax error score is 323613
+The autoComplete score is 3103006161
+```

main.go

@@ -12,6 +12,7 @@ import (
 	"unsupervised.ca/aoc2021/one"
 	"unsupervised.ca/aoc2021/seven"
 	"unsupervised.ca/aoc2021/six"
+	"unsupervised.ca/aoc2021/ten"
 	"unsupervised.ca/aoc2021/three"
 	"unsupervised.ca/aoc2021/two"
 )
@@ -49,6 +50,8 @@ func main() {
 		day = eight.Init("eight/input.txt")
 	case "nine":
 		day = nine.Init("nine/input.txt")
+	case "ten":
+		day = ten.Init("ten/input.txt")
 	default:
 		fmt.Printf("%q does not have a solution.\n", flagParts[1])
 		help()

ten/input.txt

@@ -0,0 +1,90 @@
+(((<(([{{((<[[<><>]<()[]>]{[{}()]<(){}>}>[<([]{})>])(<<(<><>>[<><>]>(<{}()><(){}>)>[(([])<[]()>)])){<((<{}()
+{(({({<[[[{[{({}{})[[]{}]}[{(){}}((){})]][{((){}){[]{}}}<(()())<<><>>>]}]]]{([<{<<()()>([][])>({[]()}[{}<
+[[{<(([<<{(<[[()()]]{[[]()]<{}>}><{{{}()}<<>[]>><(())[()[]]>>)([{[[][]][()()]}{{()()}}](<{{}()}>))}[([{<<
+{<[{<{[({[[[[{<>{}}<{}()>]<{<><>}{[][]}>](<<<>[]>[()()]>[{[]{}>[<>()]])]{{{[()()][<><>]}<[{}()][{}{}]
+(<[{[{[((<{[[<()()><{}{}>][(<>{}){{}{}}]]{<[<><>]>{{{}[]}(<>[])}}}(<[[[]{}](<>{})]{[[][]][[][]]}>)>)){<{
+<<<(<(<[[[<[{{[]<>}([]())}([[]])]([[[]<>][()()]]{<()()>([]{})])>]{[[<{[]{}}([]{})>{(<>[]){{}{}}}]]{({{<>[]
+[{<(({(<{<{<<{<><>}>({<><>}<<><>>)}{[{[]<>}[[][]]][<()<>>]}}<[[[()()]{<><>}]((<>)[{}()])]{<{()<>}
+<[([{{{({<({(<(){}><[]()>)((()())[[]()})})[<{<<>>((){})}<[<><>]{(){}}>>{{(<>[])({}[])}(<()<>>)}]>})}({{({
+{[{{(<[[[<(((([]())[[]<>]){(()())[[]<>]})[{([]<>)[<><>]}<({}{})>])>{[(<<<>{}>(()<>)>)]<{([<><>]<[]()>><<{}[
+(<<[<({[(<{[({<><>}<{}<>>)]}<<([<>[]])(<{}{}>[[]{}])>>>(([{[<>[]][{}[])}<(<><>)({}[])>](<<()
+{{[<(((<([{(<[<>{}]({}())>){{[{}]<[][]>}[{<>()}{<><>}]}}][<<{<[]<>>[{}<>]}[<{}{}>]>[<[[]<>]<()()>>[[[]
+<<<([([{{<({[{[][]}[{}<>]]}<[(()<>)[{}<>]]>){{{[()<>]}(<<>>({}[]))}(([[]()][[]{}])<([]<>)[<><
+({[[[([[([<{<{{}()}{<><>}>}>])[{(({([][])[{}()]}{(<><>)[[][]]})<<<{}>[{}[]]>(({}())<()<>>)>)
+<[{[[[<({<<[{<<>>{{}{}}}{[()[]]}]<[<[]<>>{<>{}}]>>>((<{{[]{}}{<><>}}>[{({}{})<{}<>>}]))}[({
+<({[<{(([[[{<<()<>>((){})><{()[]}<{}()>}}[([<>{}][()<>])]]<(([(){}])<{(){}}[[]()]>)<{[(){}](<>[
+[<<{{[<<{[<{({<>[]})({{}<>})}><<<<()[]>(()<>)>>[{{[][]}[[][]]}((<>)<<><>>)]>][(<{[[][]]<[]<>>}>(<((){}){[]<
+({[({(<{<<<<{({}())(()<>)}><({{}[]}<<><>>){[{}<>]}>>]<((([{}{}]<[][]>)({[][]}<{}()>)))<<{[[]<>][[]()]}{<<><
+<[<<([<[(<<{[[(){}]<[][]>]<({}<>)[(){}]>}<[({}[]){()()}]({{}[]}[()()])>>><(<({{}<>}{[]()})[(<>
+[[[([<<[<[<{[[(){}]((){})][(()<>)<()>]}(<{[]{}}{[]}>)>]{{[{{<><>}<()<>>}{[(){}]<<>{}>}]([[[]<
+((([[[{<{[<{[{<>{}}]}({<[]>[{}{}]}<({}{})([][])>}>(((({}{})<{}()>){<<>{}>{{}<>}})(<{{}<>}{{}}
+[<[{[({<[({{{<<>{}><()[]>}}{([<>()]{{}[]})({()[]}[<>[]])}}[{(<()[]>([]{}))<<()<>><[]()>>}{[<<>
+<{{([({<{([<<(()<>)[[]{}]><{()()}<<><>>>>]){{<{{()()}<()<>>}>[{(<><>)<[]()>}]}[((<{}()>){[()[]]{()()}})]
+<{[([{{[[[<<[<()<>><[]()>][(<>())(()<>)]>(([{}{}]([][])){<[]<>>([]{})})>{[[<{}[]>((){})]{<<>
+{[<([{({{({({[[]()]{(){}}}<([]{})[<>{}]>)<<[()[]]>([()[]])>}{[(({}<>)<()()>)[{(){}}<{}{}>]]}>{[[{
+<<({{<<{<[{[{({}{})[()]}(<{}{}><[]()})]<{[[][]]({}[])}{(<>{})<()[]>}>}<[({{}<>}{<>()}){({}[
+([[[<<{<([[(({<>()}{[][]})[[()<>][()]]){{{()[]}(<>[])}<([]<>)[[]<>]>}]])>{(({{{[<>{}]{[][]}}}}<[(({}[])<<><>
+[<(({<[[{([{<<()()>(()<>)><<[]{}>{()<>}>}{<<{}>>{{[]{}}<()<>>}}]{<{[{}<>]([][])}}<{[()()][{}]}>})(([[<{}
+<{(<{(((<{<<(<<>>{<>{}})[([]<>)(()[])]><[([]{})((){})}<<{}[]>(<><>)>>><{{{<>{}}(<>[])}{[()()][()
+<{<[<<[({<[[<{{}[]}><({}{})({}[])>]]<[<{{}<>}>]({[{}]{<>[]}})>>[<(([{}<>]){<<>[]>[<><>]})[(<{}()>{[
+(([[(([<<(<(<{()()}(<><>)><(<>{})<[][]>>)[<((){})<{}{}>>{{()()}{<>{}}}]>[<<<()()>(<>[])><(()[
+<{({{({<[(<{<(<>{})<<>{}>>(({}[]))}(((<>())<{}<>>)(<()>))>([[([]<>)<{}[]>][[<><>]<(){}>]][{<(){}>(
+<<{(<(({[<<{[(<><>)[<>{}]]{<[]()>({}{})}}<(<{}[]>)[{<>()}<[]<>>])>>]{((({(<>[]){()<>}}[{[][
+(([((<([[([<[{[]{}}({}[])][<{}{}>[()[]]]>(<<{}[]>>)])([{(<[]{}>([]<>))}<[{<>}[{}<>]]([(){}][{}[]})>]
+(([{(([{[<{<<<[][]><()<>>>(({}[]){{}<>})>}({{<[]()>({}[])}([(){}][{}<>])}(([[]<>][[][]])[{{}()}<<>
+([(<<([{<[<(<<(){}>{[]()}>((()<>){[]<>}))[{([][])}<[<><>]{{}{}}>]>(({(<>[])[(){}]}(({}[])<<>()>)))]>{{[{[[
+{(((([<{({[(<[<>[]][[]]><(()[])[[][]]>)]({{{(){}}[<>[]]}((()[])<[][]>)}{{<()<>>([][])}<{()>>})}<<(({<
+<[({<<{{(({<{{[]{}}(<><>)}<[()[]]<{}()>>)<<{{}[]}>([()[]]({}{}))>}){({{[(){}][<>()]}[[()()][()[
+{<([[{((([[{([[][]]<()<>>)<[<>{}]<{}()>>}]]((<[([]{})[<>()]][<[]>{<>}]><({{}<>}{[]()})(<()()>(<>{}))>)))){(([
+{(([{([{((({[{()[]}((){})]{{[]()}[()()]}}<<<{}[]>>({()()}{[]()})>)((({<>[]}[<>{}])(([]{})))[[{()[]}{<>{}
+(<(<[[(((<[<<{{}[]}[[]{}]>[{()[]}<(){}>]>]>)[[([[{()<>}<<>()>]<({}{})<{}{}>>]){{[{<>[]}{()()}
+(([[(([(<{([[<()()>[{}{}]][<[]{}><[]()}]]{<<{}<>>>})[[{([]())<[]()>}[<{}{}>[<>{}]]][((()())([]()))([[]
+[<([<{({({[[({()<>}[{}{}>)]{([{}()]{{}})[[[]{}]<{}{}>]}]})<{{{{(<>)([]{})}[<[]()><{}{}>]}}{{<[{}()]{{}
+<([{[([<(([[(<{}()>([]{}))({{}}(<>()))][{(()<>]([]{})}[[[]<>]{()[]}]]]((<[[]<>][<>]><{{}{}
+<<([[<{[[([[{<[]<>><[]{}>}][([<><>]([]()))<[()()]([]<>)>]][[<[()<>][<>[]]>({<>{})[<>{}])]<
+<{([[(<(({{<({()}[{}[]])(<[]<>>)>}{{[([][])({}<>)]<<{}{}>{<>[]}>}[[[[]()]({}())]((())[[][]])]>}(
+{[[{[<[<<(<{<(<>()){{}<>}>}[<<{}[]>[[][]]>((()[])[()()])]}[{<{{}{}}[{}{}]><[[][]][(){}]>}[[[<>{}]<
+{<<{[(<{{[[([<[]()>{{}()}][{<>{}}[<>()]])]({(<[]{}>){{[][]}([]())}}<[[<>]<<>{}>]<{[]()}({}{})>>)](
+[<[[[{<[{[(([{<>[]}<{}<>>][{()<>}[[]<>]]){([[]()]<()>)<[{}{}][{}{}]>})[((<{}{}><<>()>){([]<>]<[][]>})({<<
+{<(((<{<{{{<[([]{}){[]{}}]<[[]<>][<>()]>>(<[<><>][<>{}]><[(){}][()()]>)}((<{{}<>}<()[]>>{{[]{}}{
+(<<[[[[{[{{(<(<>{}){[]}>{<[]<>>([][])}){{([]())(()())}}}}){[[{(<<><>><()<>>)<(()[])<{}()>>}]]}}({[(<{[[]()
+{({(<{<<<<((<[()<>]((){})>)){<<{<>}([][])>>(<<()()>([]())><[{}{}][{}<>]>)}>>([([[[[]<>]<[]()>]{<()[]><<>()
+<{[(({{([(({<<[]<>]>{<<><>>[<><>]}}<(<()()>)[(()<>)]>){[(<{}{}>[{}<>])]})]{(<<[[[][]]([]{})]>>)[<([[()]
+{({{<(<<{[([((()<>)<{}<>>)<[<>[]]{{}<>}>](<([][])(<><>}>))[[([[]{}][<><>]){[{}()]({}{})}]<([{}[]]{<><>}
+<({[(([[[<<((([]{})<()[]>)((<>)<[]>))(<({}<>)[()()]>[([]<>){{}<>}])>[{[([])([]())]<[()()]<{}<>>>}
+{{{[[<{{{[[[(({}[]))]{([{}()][[][]])[[[]<>]([]<>)]}]]((([[<>]{[]{}}]<[<>()]<(){}>>)({[(){}][
+[{{([{{<(<<({[(){}]{()()}}[[[]{}]<<>[]>])>>[<<<{{}()}({}[])>><(<()()>(()()))({[]{}})>><{({<>{}}{<>[]})[<{}
+<<<<{{<<[[<[((()[])<{}{}>)<(()[])({}())>](({<>}{{}[]}}{[(){}]{()<>}})>({(<{}<>>(()[]))<<{}[]>{{}[]}>}<{{[][]}
+<<((({[{[{<([([]())<()()>][<{}[]>([])]){({()}<()()>)<([]())(<><>}>}><<<{{}<>}[[]<>]>[[()](<><>)]>
+(<{[[[[([([[<{<>{}}<[]()>>{<<>[]>}]{((<>{}){[]<>})<(()())([]{})>}](<[([]<>)(<><>)]{<[]<>>(<
+[{<(<<<[(<{<[[[][]](<>())][<{}{}><{}()>]><{<[][]><<>[]>}{({}<>)}>}<<[({}())([]())]<<{}{}><()<>>>>[(
+[[([({[{([[(<[(){}]<[]{}>>((())(()()))]]((({<><>}(()())){{{}()}}){{[<>()]{{}()}}<[[]<>]<{}()>>})]<(({<[][]>
+<<{[(<({{({(<{{}<>}(()<>)><{[]{}}[[]{}]>){[<<>()>{{}}]((()[])[[]{}])}}[((({}<>)[()()])<[{}[]]<<>[]>>
+[<{<({{({{{({{()[]}[()[]]})<{(<><>)[()<>]}{{<>{}}}>}<<{({}{})({}<>)}[[()<>][[]{}]]>[([{}[]](()))(<<>
+{{({{{[[[(<[<{<>()><{}[]>>{<[]<>>[<>]}]>[<<[<>()]([]{})>{(<>)(<><>)}>(<(<>{})([]<>)>(<(){}>[{}[]]))
+<{[{[{[(<<({[({})([][])][[(){}]([][])]}<{<{}<>>{[][]}}{((){}){{}{}}}>)[<{[[]{}][{}{}]}({()()}([]{}))>[[[<
+({<<{[<(({[[([[][]])[(<>[])[{}()]]]<{<{}<>><[]<>>}<({}{})<{}()>>>}(<(<()[]>[{}[]])<([])<<>[]>>>{<[<>()]
+<<{<{{([(({([{[]<>}[{}{}]]([()()][[]{}]))}[<{{[][]>{{}[]}}{[<>[]]{{}()}}>{((()<>)[(){}])}]))][({[<(<[]
+({<[[{((<[[[({<>[]}{[]{}})({{}[]][<>[]])](({()<>}<{}[]>)(({}<>)<[]<>>))][<<<(){}>>{(<>{}){(
+({(((<{[([{[(([][])([]<>))[{[][]}<[][]>]]}((<((){})(<><>)>(([][]){<>}))([({}[])<[]()>]{<<>[]>{(){}}}))]({<<
+([[[[[([<<{<[<[]<>>([]())]{{<>{}}<<><>>}>[<[()[]][[]<>]>({<>{}}<()})]}[[[(()[])({}())]]((((
+([(<<{<(<{<{[[<>]]<[<>[]]({}())>}><<{(()<>)(<><>)}{(<>[])<{}[]>}><<[<>()]<<>>><{{}{}}>>>}>)>}>{{
+({<<{([({{([{{<>}({}{})}([[]()]{[]()})][{<<>()>([])}<[[]{}]}])(([[[]{}]{()[]}]([{}()]<()<>>))
+(<{<[{[(<{([(((){}))[((){})<()()>]]{{[[][]]<(){}>}((<><>)<[][]>)})}{((<([]{})<<>[]>>{<[]{}>{{}<>}}))[({{<>(
+<<<{{([[[{[{(((){})[<>[]])([{}()){()<>})}{{({}())}{{<><>}}}][<<[[]<>](<>)>{[()()]{{}()}}>[[<{}{
+<(<[{[([[(({[<{}<>>](([]{})([]()))}({<{}[]><()<>>}<[[][]]<[][]>>))<{[<()()><(){}>]([<><>]({}[]))}>)[[
+<({<<[(({{{([{{}<>}<()()>](({}{})<()<>>))((<(){}>([]{}))([<><>]))}{{<{{}{}}{<>[]}>[{(){}}<(){}>]}(
+{{{([[([[<[(<<[]{}><[]()>>(<{}>(<>{})))[([[]{}](()<>))((<><>)[{}()])]]>]<([<((<>[])(<>))[{()()}({})]>]
+{[<{((([<[({{{()[]}{()()}}((<>{})[[]<>])>){(<[[][]]>[(()())(<>[])])[<{<>[]}({}<>)>]}][(([[{}()]({}
+{<{[(({{[({[[[()()][(){}]]{<[]()>(()[])}]<(<<>()>({}{}))>})<(<<([]<>)(()())>{((){}){<>()}}>)>]{{([[[{}]]]((<<
+<<{({[{[[<[({(<>{})({}[])}<([]())[(){}]>)<<{(){}}(()<>)>{({}{})<{}<>>}>]{<[[()()]{{}<>}]({{}}<()()>)>[<
+({([{<<{[{(({(()())([][])}({{}[]}((){}))))}([{<{()[]}({}())>[({})[[]{}}]}<([<><>]([]()))>](<{(<>())(
+([<{{({<{[[{<{[]<>}>}([{[][]}[[][]]])]({[{[]<>}[[]<>]](({}[])[()()])}{({()()))<{{}[]}{[]{}}>})][[([<()
+((({<<(({(<{[<<>[]>]{[(){}]<()()>}}{<{[]}{<><>>>([<>[]]<<><>>)}>{<({(){}})[({}{})([]{})]>({{<>[]}<{}[]>}<<[
+[{<({[[([<<[(({}[])((){}))]({[[][]][[][]]})>(([{[][]}[<>()]]{{<>()}(<>)}){<{<><>}){[()[]]{{}[]}}})>])]({(
+{(<(([{{<{[[[(()[])(()<>)][{<>{}}[[][]]]]][{{<{}<>>{{}[]}}({()<>}[[]{}])}{[<{}{}>[[]<>]](<<>{}><(){}>
+[(<[<<<({{[<(({}())<()()>){[[]{}]}>({({}())([]{})}([[]()]))]{[[<{}{}><[][]>]<<{}[]>({}())>]{{{()[]}{[][]}
+([{[{<<<[{{({[{}()]}<<<>[]>{<>[]}>)((([]<>))([<>{}]))}{{[([]{})<(){}>}((()[])<[]()>)}({[(){}
+[({[<[[[(((<<[[]]<[]<>>>>{{([]<>){()[]}}})(({(<><>)({}())})<({{}[]}{[]()})[{()<>}([][])]>)
+<[[{[[{{[[[<<{()[]}<[][]>>{<<><>>[{}]}>{[<{}<>><[]<>>](((){}))}]{{<((){}){<>{}}>{(<>())[<>[]]}}<<{{}()}((
+(<[{(<<([[([[<{}{}>[<>[]]]][[{{}()}]<[<>()][()<>]>])<{[(<>{})(()[])]{[{}()][<>()]}}<((<>[]){<>()})(<()

ten/main.go

@@ -0,0 +1,25 @@
+package ten
+
+import "fmt"
+
+type Ten struct {
+	navigation navigation
+}
+
+func Init(filepath string) *Ten {
+	ten := &Ten{
+		navigation: navigation{},
+	}
+
+	ten.navigation.load(filepath)
+	ten.navigation.parse()
+	return ten
+}
+
+func (d *Ten) Answer() string {
+	return fmt.Sprintf("The syntax error score is %d", d.navigation.syntaxScore())
+}
+
+func (d *Ten) FollowUp() string {
+	return fmt.Sprintf("The autoComplete score is %d", d.navigation.autoCompleteScore())
+}

ten/navigation.go

@@ -0,0 +1,134 @@
+package ten
+
+import (
+	"bufio"
+	"os"
+	"sort"
+)
+
+var syntaxScores = map[rune]int{
+	')': 3,
+	']': 57,
+	'}': 1197,
+	'>': 25137,
+}
+
+var autoCompleteScores = map[rune]int{
+	'(': 1,
+	'[': 2,
+	'{': 3,
+	'<': 4,
+}
+
+var pairs = map[rune]rune{
+	')': '(',
+	'}': '{',
+	']': '[',
+	'>': '<',
+}
+
+type errorType string
+
+const (
+	corrupted  errorType = "corrupted"
+	incomplete errorType = "incomplete"
+)
+
+type syntaxError struct {
+	line      string
+	symbol    rune
+	violation errorType
+	stack     []rune
+}
+
+type navigation struct {
+	input      []string
+	validInput []string
+	errors     []syntaxError
+}
+
+func (n *navigation) load(filename string) error {
+	file, err := os.Open(filename)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		n.input = append(n.input, scanner.Text())
+	}
+	return nil
+}
+
+func (n *navigation) parse() {
+	for _, input := range n.input {
+		stack := []rune{}
+		var e *syntaxError
+		for _, r := range input {
+			switch r {
+			case '(', '{', '[', '<':
+				stack = append(stack, r)
+				continue
+			case ')', '}', ']', '>':
+				if len(stack) < 1 || stack[len(stack)-1] != pairs[r] {
+					e = &syntaxError{
+						line:      input,
+						symbol:    r,
+						violation: corrupted,
+					}
+				} else {
+					stack = stack[:len(stack)-1]
+				}
+			}
+
+			if e != nil {
+				break
+			}
+		}
+
+		if e == nil && len(stack) > 0 {
+			e = &syntaxError{
+				line:      input,
+				symbol:    stack[0],
+				violation: incomplete,
+			}
+		}
+
+		if e != nil {
+			e.stack = stack
+			n.errors = append(n.errors, *e)
+		} else {
+			n.validInput = append(n.validInput, input)
+		}
+
+	}
+}
+
+func (n *navigation) syntaxScore() (score int) {
+	for _, e := range n.errors {
+		if e.violation == corrupted {
+			score += syntaxScores[e.symbol]
+		}
+	}
+
+	return score
+}
+
+func (n *navigation) autoCompleteScore() int {
+	scores := []int{}
+	for _, e := range n.errors {
+		if e.violation == incomplete {
+			total := 0
+			for i := len(e.stack) - 1; i >= 0; i-- {
+				total = (total * 5) + autoCompleteScores[e.stack[i]]
+			}
+			scores = append(scores, total)
+		}
+	}
+
+	// Find the middle value
+	sort.Ints(scores)
+	medianIndex := int(len(scores)/2) + 1
+
+	return scores[medianIndex-1]
+}

ten/navigation_test.go

@@ -0,0 +1,65 @@
+package ten
+
+import (
+	"testing"
+)
+
+func Test_read(t *testing.T) {
+	n := navigation{}
+	if err := n.load("test_input.txt"); err != nil {
+		t.Log(err)
+		t.FailNow()
+	}
+
+	if len(n.input) != 10 {
+		t.Logf("Expected 10 inputs, found %d", len(n.input))
+		t.Fail()
+	}
+}
+
+func Test_parse(t *testing.T) {
+	n := navigation{}
+	n.load("test_input.txt")
+
+	n.parse()
+
+	corruptedLines := 0
+	for _, e := range n.errors {
+		if e.violation == corrupted {
+			corruptedLines++
+		}
+	}
+
+	if corruptedLines != 5 {
+		t.Logf("Expected 5 corrupt inputs, found %d", corruptedLines)
+		t.Fail()
+	}
+}
+
+func Test_syntaxScore(t *testing.T) {
+	n := navigation{}
+	n.load("test_input.txt")
+
+	n.parse()
+
+	score := n.syntaxScore()
+
+	if score != 26397 {
+		t.Logf("Expected syntax score of 26397, found %d", score)
+		t.Fail()
+	}
+}
+
+func Test_autoCompleteScore(t *testing.T) {
+	n := navigation{}
+	n.load("test_input.txt")
+
+	n.parse()
+
+	score := n.autoCompleteScore()
+
+	if score != 288957 {
+		t.Logf("Expected autoComplete score of 288957, found %d", score)
+		t.Fail()
+	}
+}

ten/test_input.txt

@@ -0,0 +1,10 @@
+[({(<(())[]>[[{[]{<()<>>
+[(()[<>])]({[<{<<[]>>(
+{([(<{}[<>[]}>{[]{[(<()>
+(((({<>}<{<{<>}{[]{[]{}
+[[<[([]))<([[{}[[()]]]
+[{[{({}]{}}([{[{{{}}([]
+{<[[]]>}<{[{[{[]{()[[[]
+[<(<(<(<{}))><([]([]()
+<{([([[(<>()){}]>(<<{{
+<{([{{}}[<[[[<>{}]]]>[]]