diff --git a/.gitmodules b/.gitmodules
index 188aa93..a2bfe96 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,66 +1,69 @@
 [submodule "Lukas"]
-	path = Lukas
+	path = 2020/Lukas
 	url = https://github.com/lvrossem/Advent-of-Code-2020
 [submodule "Flynn"]
-	path = Flynn
+	path = 2020/Flynn
 	url = https://gitlab.com/mcbloch/aoc2020
 [submodule "Rien"]
-	path = Rien
+	path = 2020/Rien
 	url = https://github.com/rien/adventofcode2020
 [submodule "Robbe"]
-	path = Robbe
+	path = 2020/Robbe
 	url = https://github.com/Robbe7730/adventofcode2020
 [submodule "Francis"]
-	path = Francis
+	path = 2020/Francis
 	url = https://github.com/fbegyn/aoc2020
 [submodule "Timo"]
-	path = Timo
+	path = 2020/Timo
 	url = https://github.com/timodw/AoC20
 [submodule "Kobe"]
-	path = Kobe
+	path = 2020/Kobe
 	url = https://github.com/SchrodingersCat00/aoc2020
 [submodule "Jasper"]
-	path = Jasper
+	path = 2020/Jasper
 	url = https://github.com/jaspervdj/advent-of-code
 [submodule "Lorin"]
-	path = Lorin
+	path = 2020/Lorin
 	url = https://github.com/werthen/AoC-2020
 [submodule "Felix"]
-	path = Felix
+	path = 2020/Felix
 	url = https://github.com/ninewise/adventofcode-2020
 [submodule "Francis."]
-	path = Francis.
+	path = 2020/Francis.
 	url = https://github.com/FKD13/AoC2020
 [submodule "Mel"]
-	path = Mel
+	path = 2020/Mel
 	url = https://gitlab.com/Melsarion/adventofcode2020
 [submodule "Poef"]
-	path = Poef
+	path = 2020/Poef
 	url = https://github.com/Iepoev/AoC20
 [submodule "JP"]
-	path = JP
+	path = 2020/JP
 	url = https://github.com/Jan-PieterBaert/advent-of-code
 [submodule "Niko"]
-	path = Niko
+	path = 2020/Niko
 	url = https://github.com/niknetniko/AdventOfCode
 [submodule "Silvius"]
-	path = Silvius
+	path = 2020/Silvius
 	url = https://github.com/ajuvercr/aoc_2020
 [submodule "Bram"]
-	path = Bram
+	path = 2020/Bram
 	url = https://github.com/bravdwal/aoc2020
 [submodule "redfast00"]
-	path = redfast00
+	path = 2020/redfast00
 	url = https://github.com/redfast00/aoc2020
 [submodule "Charlotte"]
-	path = Charlotte
+	path = 2020/Charlotte
 	url = https://github.com/charvp/aoc2020
 [submodule "Arthur_Swamp"]
-	path = Arthur_Swamp
+	path = 2020/Arthur_Swamp
 	url = https://github.com/AWerbrouck/AOC2020
 [submodule "Lode"]
-	path = Lode
+	path = 2020/Lode
 	url = https://github.com/Bond-009/advent-of-code-2020
 [submodule "Mraedis"]
-	path = Mraedis
+	path = 2020/Mraedis
 	url = https://github.com/Mraedis/AoC2020
+[submodule "2021/ninewise"]
+	path = 2021/ninewise
+	url = https://git.fuyu.moe/ninewise/adventofcode-2021.git
diff --git a/Arthur_Swamp b/2020/Arthur_Swamp
similarity index 100%
rename from Arthur_Swamp
rename to 2020/Arthur_Swamp
diff --git a/Bram b/2020/Bram
similarity index 100%
rename from Bram
rename to 2020/Bram
diff --git a/Charlotte b/2020/Charlotte
similarity index 100%
rename from Charlotte
rename to 2020/Charlotte
diff --git a/Felix b/2020/Felix
similarity index 100%
rename from Felix
rename to 2020/Felix
diff --git a/Flynn b/2020/Flynn
similarity index 100%
rename from Flynn
rename to 2020/Flynn
diff --git a/Francis b/2020/Francis
similarity index 100%
rename from Francis
rename to 2020/Francis
diff --git a/Francis. b/2020/Francis.
similarity index 100%
rename from Francis.
rename to 2020/Francis.
diff --git a/JP b/2020/JP
similarity index 100%
rename from JP
rename to 2020/JP
diff --git a/Jasper b/2020/Jasper
similarity index 100%
rename from Jasper
rename to 2020/Jasper
diff --git a/Kobe b/2020/Kobe
similarity index 100%
rename from Kobe
rename to 2020/Kobe
diff --git a/Lode b/2020/Lode
similarity index 100%
rename from Lode
rename to 2020/Lode
diff --git a/Lorin b/2020/Lorin
similarity index 100%
rename from Lorin
rename to 2020/Lorin
diff --git a/Lukas b/2020/Lukas
similarity index 100%
rename from Lukas
rename to 2020/Lukas
diff --git a/Mel b/2020/Mel
similarity index 100%
rename from Mel
rename to 2020/Mel
diff --git a/Mraedis b/2020/Mraedis
similarity index 100%
rename from Mraedis
rename to 2020/Mraedis
diff --git a/Niko b/2020/Niko
similarity index 100%
rename from Niko
rename to 2020/Niko
diff --git a/Poef b/2020/Poef
similarity index 100%
rename from Poef
rename to 2020/Poef
diff --git a/2020/README.md b/2020/README.md
new file mode 100644
index 0000000..8543897
--- /dev/null
+++ b/2020/README.md
@@ -0,0 +1,61 @@
+# De Zeus Advent of Code
+
+| Wie?           | Waar? (Repository)                                | Taal?      |
+| :------------- | :-----------------------------------------------: | ---------: |
+| Lukas          | https://github.com/lvrossem/Advent-of-Code-2020   | Rust       |
+| Flynn          | https://gitlab.com/mcbloch/aoc2020                | Elixir     |
+| Rien           | https://github.com/rien/adventofcode2020          | Elixir     |
+| Robbe          | https://github.com/Robbe7730/adventofcode2020     | Rust       |
+| Francis        | https://github.com/fbegyn/aoc2020                 | Go         |
+| Timo           | https://github.com/timodw/AoC20                   | Rust       |
+| Kobe           | https://github.com/SchrodingersCat00/aoc2020      | Haskell    |
+| Jasper         | https://github.com/jaspervdj/advent-of-code       | Haskell    |
+| Lorin          | https://github.com/werthen/AoC-2020               | TensorFlow |
+| Felix          | https://github.com/ninewise/adventofcode-2020     | Shell      |
+| Francis.       | https://github.com/FKD13/AoC2020                  | Erlang     |
+| Mel            | https://gitlab.com/Melsarion/adventofcode2020     | Elixir     |
+| Poef           | https://github.com/Iepoev/AoC20                   | Elixir     |
+| Lode           | https://github.com/Bond-009/advent-of-code-2020   | C          |
+| JP             | https://github.com/Jan-PieterBaert/advent-of-code | Rust       |
+| Niko           | https://github.com/niknetniko/AdventOfCode        | Elixir     |
+| Silvius        | https://github.com/ajuvercr/aoc_2020              | Haskell    |
+| Bram           | https://github.com/bravdwal/aoc2020               | Perl       |
+| redfast00      | https://github.com/redfast00/aoc2020              | Python     |
+| Charlotte      | https://github.com/charvp/aoc2020                 | Nix        |
+| Arthur/Swomp   | https://github.com/AWerbrouck/AOC2020             | Java       |
+| Mraedis        | https://github.com/Mraedis/AoC2020                | Python     |
+
+* repo clonen:
+
+    ```sh
+    git clone --recursive git@github.com:ZeusWPI/Advent-of-Code-Aggregator.git
+    ```
+
+* nieuwe toevoegen:
+
+    ```sh
+    git submodule add <link zoals in tabel> <naam zoals in tabel>
+    git commit -m 'hey guys ik heb een repo toegevoegd'
+    ```
+
+* uw lokale kopie updaten:
+
+    ```sh
+    git pull # duh
+    git submodule update
+    ```
+
+* van alle submodules de nieuwste versie binnenhalen (zelfs als mensen *force push*en):
+
+    ```sh
+    git submodule foreach git fetch origin
+    git submodule foreach git reset --hard origin/HEAD > /dev/null 2>&1
+    git add * # oh no
+    git commit -m 'update submodules'
+    ```
+
+* benchmarks uitvoeren:
+
+    ```sh
+    git submodule foreach ../benchmark <day> <part>
+    ```
diff --git a/Rien b/2020/Rien
similarity index 100%
rename from Rien
rename to 2020/Rien
diff --git a/Robbe b/2020/Robbe
similarity index 100%
rename from Robbe
rename to 2020/Robbe
diff --git a/Silvius b/2020/Silvius
similarity index 100%
rename from Silvius
rename to 2020/Silvius
diff --git a/Timo b/2020/Timo
similarity index 100%
rename from Timo
rename to 2020/Timo
diff --git a/benchmark b/2020/benchmark
similarity index 100%
rename from benchmark
rename to 2020/benchmark
diff --git a/inputs/01-input b/2020/inputs/01-input
similarity index 100%
rename from inputs/01-input
rename to 2020/inputs/01-input
diff --git a/inputs/02-input b/2020/inputs/02-input
similarity index 100%
rename from inputs/02-input
rename to 2020/inputs/02-input
diff --git a/inputs/03-input b/2020/inputs/03-input
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rename from inputs/03-input
rename to 2020/inputs/03-input
diff --git a/inputs/04-input b/2020/inputs/04-input
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rename from inputs/04-input
rename to 2020/inputs/04-input
diff --git a/inputs/05-input b/2020/inputs/05-input
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rename from inputs/05-input
rename to 2020/inputs/05-input
diff --git a/inputs/06-input b/2020/inputs/06-input
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rename from inputs/06-input
rename to 2020/inputs/06-input
diff --git a/inputs/07-input b/2020/inputs/07-input
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rename from inputs/07-input
rename to 2020/inputs/07-input
diff --git a/inputs/08-input b/2020/inputs/08-input
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rename from inputs/08-input
rename to 2020/inputs/08-input
diff --git a/inputs/09-input b/2020/inputs/09-input
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rename from inputs/09-input
rename to 2020/inputs/09-input
diff --git a/inputs/10-input b/2020/inputs/10-input
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rename from inputs/10-input
rename to 2020/inputs/10-input
diff --git a/inputs/11-input b/2020/inputs/11-input
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rename from inputs/11-input
rename to 2020/inputs/11-input
diff --git a/inputs/12-input b/2020/inputs/12-input
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rename from inputs/12-input
rename to 2020/inputs/12-input
diff --git a/inputs/13-input b/2020/inputs/13-input
similarity index 100%
rename from inputs/13-input
rename to 2020/inputs/13-input
diff --git a/redfast00 b/2020/redfast00
similarity index 100%
rename from redfast00
rename to 2020/redfast00
diff --git a/2021/benchmark b/2021/benchmark
new file mode 100755
index 0000000..83cb4af
--- /dev/null
+++ b/2021/benchmark
@@ -0,0 +1,20 @@
+#!/bin/sh
+day="$(printf '%02d' "$1")"
+part="$2"
+inputfile="../inputs/$day-input"
+
+[ -x "prepare" ] || exit 0
+
+if ! ./prepare "$day" "$part" "$inputfile"; then
+	echo 'eh ge hebt precies niet alles geïnstalleerd staan'
+else
+	if [ -x "run" ]; then
+		hyperfine "./run '$day' '$part' '$inputfile'"
+	fi
+fi
+
+if [ -x "clean" ]; then
+	./clean
+fi
+
+true
diff --git a/2021/complete-benchmark b/2021/complete-benchmark
new file mode 100755
index 0000000..853d9da
--- /dev/null
+++ b/2021/complete-benchmark
@@ -0,0 +1,31 @@
+#!/bin/sh
+day="$1"
+part="$2"
+
+day="$(printf '%02d' "$day")"
+
+inputfile="$PWD/inputs/${day}.txt"
+
+if ! test -f "$inputfile"; then
+	echo "no input available" >&2
+	exit 1
+fi
+
+for dir in *; do
+	if test -d "$dir"; then
+		cd "$dir"
+		if test -x ./prepare; then
+			if ! ./prepare "$day" "$part" >&2; then
+				echo 'eh ge hebt precies niet alles geïnstalleerd staan'
+			else
+				if test -x run; then
+					hyperfine -n "$dir" "./run '$day' '$part' '$inputfile'"
+				fi
+			fi
+		fi
+		if test -x ./clean; then
+			./clean "$day" "$part" "$inputfile"
+		fi
+		cd - > /dev/null 2>&1
+	fi
+done
diff --git a/2021/inputs/00.txt b/2021/inputs/00.txt
new file mode 100644
index 0000000..a1e3fbb
--- /dev/null
+++ b/2021/inputs/00.txt
@@ -0,0 +1,6 @@
+5
+10
+20
+5
+123
+0
diff --git a/2021/ninewise b/2021/ninewise
new file mode 160000
index 0000000..f4fa590
--- /dev/null
+++ b/2021/ninewise
@@ -0,0 +1 @@
+Subproject commit f4fa590833f3b5fccef401d9970e45014cbe53b8
diff --git a/README.md b/README.md
index 8543897..5f227f8 100644
--- a/README.md
+++ b/README.md
@@ -2,28 +2,7 @@
 
 | Wie?           | Waar? (Repository)                                | Taal?      |
 | :------------- | :-----------------------------------------------: | ---------: |
-| Lukas          | https://github.com/lvrossem/Advent-of-Code-2020   | Rust       |
-| Flynn          | https://gitlab.com/mcbloch/aoc2020                | Elixir     |
-| Rien           | https://github.com/rien/adventofcode2020          | Elixir     |
-| Robbe          | https://github.com/Robbe7730/adventofcode2020     | Rust       |
-| Francis        | https://github.com/fbegyn/aoc2020                 | Go         |
-| Timo           | https://github.com/timodw/AoC20                   | Rust       |
-| Kobe           | https://github.com/SchrodingersCat00/aoc2020      | Haskell    |
-| Jasper         | https://github.com/jaspervdj/advent-of-code       | Haskell    |
-| Lorin          | https://github.com/werthen/AoC-2020               | TensorFlow |
-| Felix          | https://github.com/ninewise/adventofcode-2020     | Shell      |
-| Francis.       | https://github.com/FKD13/AoC2020                  | Erlang     |
-| Mel            | https://gitlab.com/Melsarion/adventofcode2020     | Elixir     |
-| Poef           | https://github.com/Iepoev/AoC20                   | Elixir     |
-| Lode           | https://github.com/Bond-009/advent-of-code-2020   | C          |
-| JP             | https://github.com/Jan-PieterBaert/advent-of-code | Rust       |
-| Niko           | https://github.com/niknetniko/AdventOfCode        | Elixir     |
-| Silvius        | https://github.com/ajuvercr/aoc_2020              | Haskell    |
-| Bram           | https://github.com/bravdwal/aoc2020               | Perl       |
-| redfast00      | https://github.com/redfast00/aoc2020              | Python     |
-| Charlotte      | https://github.com/charvp/aoc2020                 | Nix        |
-| Arthur/Swomp   | https://github.com/AWerbrouck/AOC2020             | Java       |
-| Mraedis        | https://github.com/Mraedis/AoC2020                | Python     |
+| ninewise       | https://git.fuyu.moe/ninewise/adventofcode-2021   | ?          |
 
 * repo clonen:
 
@@ -31,7 +10,7 @@
     git clone --recursive git@github.com:ZeusWPI/Advent-of-Code-Aggregator.git
     ```
 
-* nieuwe toevoegen:
+* nieuwe persoon toevoegen:
 
     ```sh
     git submodule add <link zoals in tabel> <naam zoals in tabel>
@@ -57,5 +36,6 @@
 * benchmarks uitvoeren:
 
     ```sh
-    git submodule foreach ../benchmark <day> <part>
+    cd "2021"
+    ./complete-benchmark
     ```