diff --git a/du3/program.c b/du3/program.c
index 3216d57..dc6abaf 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -78,7 +78,7 @@ int main(){
             push(&mystack, result);
         }
         else{
-            printf("Chyba");
+            printf("bad input\n");
             return 1;
         }
         print_s(&mystack);