diff --git a/.gitmodules b/.gitmodules
index 68b9b00..5440393 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -76,3 +76,8 @@
 [submodule "2021/silvius"]
 	path = 2021/silvius
 	url = https://github.com/ajuvercr/aoc-2021.git
+[submodule "robbe"]
+	url = https://github.com/Robbe7730/adventofcode2021.git
+[submodule "2021/Flynn"]
+	path = 2021/Flynn
+	url = https://gitlab.com/mcbloch/aoc2021
diff --git a/2021/Flynn b/2021/Flynn
new file mode 160000
index 0000000..f45ba77
--- /dev/null
+++ b/2021/Flynn
@@ -0,0 +1 @@
+Subproject commit f45ba77362592f58c7f3077d8c941e653d30ad4e