tidy

06/2.py

@@ -1,4 +1,4 @@
 groups = open("input", "r").read().split("\n\n")
 people = [[set(p) for p in g.split("\n") if p] for g in groups]
-common = [p[0].intersection(*p) for p in people]
+common = [set.intersection(*p) for p in people]
 print(sum([len(c) for c in common]))