diff --git a/cv1/program.c b/cv1/program.c
index 17de8e9..7131333 100644
--- a/cv1/program.c
+++ b/cv1/program.c
@@ -12,6 +12,9 @@ int main(){
         else if(i >= 'A' && i <= 'Z'){
             i = i+32;
         }
+        if(i < 32 || i > 127){
+            i == 0;
+        }
         putchar(i);
     }
     printf("\nLines count: %d\n", riadok);