diff --git a/baz.py b/baz.py
index fb05ced..d3a0774 100755
--- a/baz.py
+++ b/baz.py
@@ -39,7 +39,7 @@ class Computer:
 
 # Computers:
 comps = {}
-for i, n in enumerate('ABCDEFGHIX'):
+for i, n in enumerate('ABCDEFGHIX', start=1):
 	comps[n] = Computer(n, i)
 
 # Bridges
@@ -72,6 +72,7 @@ for net, cs in conns.items():
 	for c in cs:
 		comps[c].add_to_bridge(bridges[net])
 
+os.mkdir('output')
 dump_bridges('output/bridges')
 
 for c in comps.values():