diff --git a/2021/1.test.ts b/2021/deno/1.test.ts
similarity index 100%
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rename to 2021/deno/1.test.ts
diff --git a/2021/1.ts b/2021/deno/1.ts
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diff --git a/2021/2.ts b/2021/deno/2.ts
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diff --git a/2021/3.test.ts b/2021/deno/3.test.ts
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diff --git a/2021/3.ts b/2021/deno/3.ts
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diff --git a/2021/common.ts b/2021/deno/common.ts
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diff --git a/2021/deps.ts b/2021/deno/deps.ts
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diff --git a/2021/common.nim b/2021/nim/common.nim
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diff --git a/2021/one.nim b/2021/nim/day1.nim
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diff --git a/2021/ten.nim b/2021/nim/day10.nim
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diff --git a/2021/two.nim b/2021/nim/day2.nim
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diff --git a/2021/three.nim b/2021/nim/day3.nim
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diff --git a/2021/four.nim b/2021/nim/day4.nim
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diff --git a/2021/five.nim b/2021/nim/day5.nim
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diff --git a/2021/six.nim b/2021/nim/day6.nim
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rename to 2021/nim/day6.nim
diff --git a/2021/seven.nim b/2021/nim/day7.nim
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diff --git a/2021/eight.nim b/2021/nim/day8.nim
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diff --git a/2021/nine.nim b/2021/nim/day9.nim
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rename to 2021/nim/day9.nim
diff --git a/2021/nim/eleven.nim b/2021/nim/eleven.nim
new file mode 100644
index 0000000..a98ea9b
--- /dev/null
+++ b/2021/nim/eleven.nim
@@ -0,0 +1,31 @@
+import ./common, std/[strutils, sequtils, algorithm, sugar, tables]
+
+const pairs = toTable {'(': ')', '[': ']', '{': '}', '<': '>'}
+const corruptPoints = toTable {')': 3, ']': 57, '}': 1197, '>': 25137}
+
+proc parse(input: seq[string]): (int, int) =
+  var cmps = newSeq[int]()
+  for line in input:
+    var stack: seq[char] = @[]
+    for ch in line:
+      if pairs.hasKey ch: stack.add pairs[ch]
+      elif stack.pop != ch:
+        result[0] += corruptPoints[ch]
+        stack.setLen 0
+        break
+    if stack.len > 0: cmps.add stack.mapIt(" )]}>".find it).foldr 5 * b + a
+  result[1] = cmps.sorted[cmps.len div 2]
+
+doDay 10, n => n.loadInput(), s => s.parse[0], s => s.parse[1],
+  @[
+    "[({(<(())[]>[[{[]{<()<>>",
+    "[(()[<>])]({[<{<<[]>>(",
+    "{([(<{}[<>[]}>{[]{[(<()>",
+    "(((({<>}<{<{<>}{[]{[]{}",
+    "[[<[([]))<([[{}[[()]]]",
+    "[{[{({}]{}}([{[{{{}}([]",
+    "{<[[]]>}<{[{[{[]{()[[[]",
+    "[<(<(<(<{}))><([]([]()",
+    "<{([([[(<>()){}]>(<<{{",
+    "<{([{{}}[<[[[<>{}]]]>[]]",
+  ], 26397, 288957
diff --git a/2021/readme.md b/2021/readme.md
index d8df5df..4f8d6bd 100644
--- a/2021/readme.md
+++ b/2021/readme.md
@@ -6,6 +6,7 @@ solutions using it.
 
 Specifically, here's my `deno --version` output:
 
+    $ deno --version
     deno 1.16.3 (release, x86_64-unknown-linux-gnu)
     v8 9.7.106.5
     typescript 4.4.2
@@ -14,7 +15,13 @@ Enjoy!
 
 **EDIT**: Since performance is not what I would like, it looks like I'm also doing some of these in Nim.
 
-**EDIT 2**: I sprinkled some zig in there. I've been meaning to mess with it for a while.
+    $ nim --version
+    Nim Compiler Version 1.6.0 [Linux: amd64]
+    Compiled at 2021-10-19
+    Copyright (c) 2006-2021 by Andreas Rumpf
+
+    git hash: 727c6378d2464090564dbcd9bc8b9ac648467e38
+    active boot switches: -d:release
 
 ## Usage
 
@@ -24,12 +31,7 @@ Run these solutions like so:
 
 And the Nim ones like so:
 
-    nim c -d:release -d:ssl --run $DAYMODULE.nim
-
-And the Zig ones like so:
-
-    zig build-exe -O ReleaseFast 6.zig -femit-bin=build/zig-$DAY
-    ./build/zig-$DAY
+    nim c -d:release -d:ssl --run day$DAY.nim
 
 And if you want to measure memory usage with Deno programs:
 
@@ -40,14 +42,8 @@ And if you want to measure memory usage with Deno programs:
 Or for Nim programs:
 
     mkdir -p build
-    nim c -d:release -d:ssl --outdir:build $DAYMODULE.nim
-    /usr/bin/time -v ./$DAYMODULE
-
-Or for Zig programs:
-
-    mkdir -p build
-    zig build-exe -O ReleaseFast 6.zig -femit-bin=build/zig-$DAY
-    /usr/bin/time -v ./build/zig-$DAY
+    nim c -d:release -d:ssl --outdir:build day$DAY.nim
+    /usr/bin/time -v ./day$DAY
 
 # Days
 
diff --git a/2021/6.zig b/2021/zig/6.zig
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rename to 2021/zig/6.zig
diff --git a/2021/common.zig b/2021/zig/common.zig
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rename to 2021/zig/common.zig