diff --git a/day15/part1.py b/day15/part1.py
index 9d8e34e..ff94a54 100644
--- a/day15/part1.py
+++ b/day15/part1.py
@@ -3,11 +3,11 @@
 from collections import defaultdict
 
 lines = (x.strip() for x in open("input.txt"))
-nums = defaultdict(list)
 TARGET = 2020
 
 for line in lines:
     print(line)
+    nums = defaultdict(list)
     turn = 0
     last_spoken = 0
     for starting in map(int, line.split(",")):
@@ -16,10 +16,7 @@ for line in lines:
         last_spoken = starting
     for t in range(turn, TARGET):
         last = nums[last_spoken]
-        if len(last) == 2:
-            n = last[1] - last[0]
-        else:
-            n = 0
+        n = last[1] - last[0] if len(last) == 2 else 0
         nums[n] = nums[n][-1:] + [t]
         last_spoken = n
     print("->", last_spoken)
diff --git a/day15/part2.py b/day15/part2.py
index 63a1973..1acd8a7 100644
--- a/day15/part2.py
+++ b/day15/part2.py
@@ -3,11 +3,11 @@
 from collections import defaultdict
 
 lines = (x.strip() for x in open("input.txt"))
-nums = defaultdict(list)
 TARGET = 30000000
 
 for line in lines:
     print(line)
+    nums = defaultdict(list)
     turn = 0
     last_spoken = 0
     for starting in map(int, line.split(",")):
@@ -16,10 +16,7 @@ for line in lines:
         last_spoken = starting
     for t in range(turn, TARGET):
         last = nums[last_spoken]
-        if len(last) == 2:
-            n = last[1] - last[0]
-        else:
-            n = 0
+        n = last[1] - last[0] if len(last) == 2 else 0
         nums[n] = nums[n][-1:] + [t]
         last_spoken = n
     print("->", last_spoken)