diff --git a/day6/common.py b/day6/common.py
new file mode 100644
index 0000000..d29b5a9
--- /dev/null
+++ b/day6/common.py
@@ -0,0 +1,3 @@
+def parse(filename: str):
+    with open(filename) as f:
+        return f.readline()[:-1]
diff --git a/day6/part1.py b/day6/part1.py
new file mode 100644
index 0000000..3e5b598
--- /dev/null
+++ b/day6/part1.py
@@ -0,0 +1,20 @@
+from common import parse
+
+
+def all_different_characters(input: str) -> bool:
+    return all(map(lambda c: input.count(c) == 1, input))
+
+
+def solve(input: str) -> int:
+    i = 0
+    while i < len(input) and not all_different_characters(input[i : i + 4]):
+        i += 1
+    return i + 4
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/day6/part2.py b/day6/part2.py
new file mode 100644
index 0000000..83e8303
--- /dev/null
+++ b/day6/part2.py
@@ -0,0 +1,20 @@
+from common import parse
+
+
+def all_different_characters(input: str) -> bool:
+    return all(map(lambda c: input.count(c) == 1, input))
+
+
+def solve(input: str) -> int:
+    i = 0
+    while i < len(input) and not all_different_characters(input[i : i + 14]):
+        i += 1
+    return i + 14
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/template/part1.py b/template/part1.py
old mode 100644
new mode 100755
index 305aecf..6692927
--- a/template/part1.py
+++ b/template/part1.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from common import parse