From fec415ca2f39bccde621473aab17952bef80214a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gustav=20S=C3=B6rn=C3=A4s?= <gustav@sornas.net>
Date: Mon, 21 Dec 2020 10:45:44 +0100
Subject: 21.2

Yes, I did it manually. What are you going to do about it?
---
 20/py/d21.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/20/py/d21.py b/20/py/d21.py
index 9f08b8c..82f5b00 100644
--- a/20/py/d21.py
+++ b/20/py/d21.py
@@ -27,7 +27,15 @@ def pt1(_in):
 
 
 def pt2(_in):
-    pass
+    all_ingredients = []
+    for line in _in:
+        all_ingredients.extend(ingredients(line))
+
+    might_be = defaultdict(lambda: set(all_ingredients))
+    for line in _in:
+        for alg in allergens(line):
+            might_be[alg] &= set(ingredients(line))
+    print(might_be)
 
 
 if __name__ == "__main__":
-- 
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