diff --git a/buggy.py b/buggy.py
--- a/buggy.py
+++ b/buggy.py
@@ -94,7 +94,7 @@
             if check(m):
                 print("Yes")
                 for line in m:
-                    print("".join([" " if c == "" else c for c in line]))
+                    print("".join(["." if c == "" else c for c in line]))
                 exit()
         else:
             for line in create_line_iter(h):
