diff --git a/2020/day14/day14.py b/2020/day14/day14.py
index d8fa532..50f2a64 100644
--- a/2020/day14/day14.py
+++ b/2020/day14/day14.py
@@ -52,7 +52,7 @@ def generate_floating_addresses(address):
 
 
 if __name__ == "__main__":
-    with open("input.txt") as infile:
-        print(part1(infile))
-        infile.seek(0)
-        print(part2(infile))
+    import fileinput
+    lines = [x for x in fileinput.input()]
+    print(part1(lines))
+    print(part2(lines))
diff --git a/2020/day16/bash.exe.stackdump b/2020/day16/bash.exe.stackdump
deleted file mode 100644
index 7ae9491..0000000
--- a/2020/day16/bash.exe.stackdump
+++ /dev/null
@@ -1,16 +0,0 @@
-Stack trace:
-Frame        Function    Args
-00600000010  001800617BE (00180251890, 0018023DFD1, 00000000058, 000FFFFB770)
-00600000010  001800490FA (00000000000, 00100000000, 00000000000, 00000000001)
-00600000010  00180049132 (00000000000, 00000000000, 00000000058, 0018031F2C0)
-00600000010  0018006D9C9 (0000000000A, 000FFFFC940, 001800458BF, 00000000000)
-00600000010  0018006DB92 (00000000003, 000FFFFC940, 001800458BF, 000FFFFC940)
-00600000010  0018006EA4C (000FFFFC940, 001802405E5, 001800EAF57, 0000000000D)
-00600000010  001800596A6 (000FFFF0000, 00000000000, 00000000000, 773CE092FFFFFFFF)
-00600000010  0018005A9C5 (00000000002, 0018031EBD0, 001800BE5F9, 00600040000)
-00600000010  0018005AE89 (001800C7664, 00000000000, 00000000000, 00000000000)
-000FFFFCCE0  0018005B149 (000FFFFCE00, 00000000000, 00000000030, 0000000002F)
-000FFFFCCE0  00180049877 (00000000000, 00000000000, 00000000000, 00000000000)
-000FFFFFFF0  001800482C6 (00000000000, 00000000000, 00000000000, 00000000000)
-000FFFFFFF0  00180048374 (00000000000, 00000000000, 00000000000, 00000000000)
-End of stack trace
diff --git a/2020/day16/day16.py b/2020/day16/day16.py
index bebb6e0..37e9ae6 100644
--- a/2020/day16/day16.py
+++ b/2020/day16/day16.py
@@ -7,8 +7,8 @@ identify invalid nearby tickets by considering only whether tickets contain valu
 """
 
 
-def main():
-    rules, my_ticket, other_tickets = open("input.txt").read().split("\n\n")
+def main(content):
+    rules, my_ticket, other_tickets = content.split("\n\n")
     rules = parse_fields(rules)
     my_ticket = my_ticket.splitlines()[1]
     other_tickets = other_tickets.splitlines()[1:]
@@ -102,4 +102,7 @@ def remove_item(candidates, item):
 
 
 if __name__ == "__main__":
-    main()
+    import sys
+    with open(sys.argv[1]) as f:
+        main(f.read())
+