diff --git a/puzzles/day03.py b/puzzles/day03.py
index b7dff89..eb7c82f 100644
--- a/puzzles/day03.py
+++ b/puzzles/day03.py
@@ -88,20 +88,17 @@ class Diagnostics:
 
     @staticmethod
     def commonality(report: List[int]) -> List[Dict[str, int]]:
-        common_counts = []
+        num_1 = defaultdict(int)
         for binary in report:
             for column, bit in enumerate(binary):
-                try:
-                    common_counts[column][bit] += 1
-                except IndexError:
-                    common_counts.append(defaultdict(int))
-                    common_counts[column][bit] = 1
+                num_1[column] += int(bit)
+
         common = []
         half_total = len(report)/2
-        for count in common_counts:
-            if count["1"] == half_total:
+        for count in num_1.values():
+            if count == half_total:
                 common.append(2) # Indicating equally common
-            elif count["1"] > half_total:
+            elif count > half_total:
                 common.append(1)
             else:
                 common.append(0)