Add day 6

d06.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+
+from sys import argv
+
+i = [x.strip().split("\n") for x in open(argv[1]).read().split("\n\n")]
+
+ok = 0
+ok2 = 0
+for g in i:
+    ci = set(g[0])
+    cx = set(g[0])
+    for p in g[1:]:
+        ci |= set(p)
+        cx &= set(p)
+    ok += len(ci)
+    ok2 += len(cx)
+print(ok)
+print(ok2)

d06_output.txt

@@ -0,0 +1,2 @@
+6310
+3193