diff --git a/du4/program.c b/du4/program.c
index ab51a0c..aadc7b4 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -43,6 +43,7 @@ for(int c=0;c<count;c++){
     if(z==0){
 	while((*start)!='\n')start++;
 	start++;
+	    printf("CHYBA\n");
 	continue;
     }
     float num1=strtof(start,&end);