diff --git a/du3/program.c b/du3/program.c
index 78e7edd..4be63f7 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -98,6 +98,7 @@ int main() {
         }
     }
     destroy_stack(s);
+    printf("no input\n");
     return 0;
 
 }
\ No newline at end of file