Finish day 6 part 2

2020/day 6/P2/custom_customs.py

@@ -0,0 +1,13 @@
+qs = []
+
+with open("input.txt") as f:
+    for q in f.read().split("\n\n"):
+        s = {}
+        q = list(filter(lambda x: x, q.split("\n")))
+        ln = len(q)
+        for a in q:
+            for le in list(a):
+                s[le] = s[le] + 1 if le in s else 1
+        qs.append(list(filter(lambda x: s[x] == ln, s)))
+
+print(sum(map(lambda x: len(x), qs)))