diff --git a/a1/program.c b/a1/program.c
index 0d817f2..aff2469 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -17,7 +17,7 @@ int main(){
         putchar(c - 'a' + 'A');
     }else if(c >= 'A' && c <= 'Z'){
         putchar(c - 'A' + 'a');
-    //}else if((c >= 0 && c < 32) || c == 127){   
+    }else if((c >= 0 && c < 32) || c == 127){   
     }else{
         putchar(c);
     }