diff --git a/du5/program.c b/du5/program.c
index 119c807..f66cf1e 100644
--- a/du5/program.c
+++ b/du5/program.c
@@ -60,7 +60,7 @@ void run_system(struct Node* node) {
     } else if (strcmp(answer, "n") == 0) {
         run_system(node->right);
     } else {
-        return;
+        printf("Nerozumiem\n");
     }
 }