diff --git a/du4/program.c b/du4/program.c
index 6509e5d..5cb3c45 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -17,7 +17,7 @@ int main() {
         int valid = 1;
         float num1 = strtof(start, &end);
         if (end == start) {
-            printf("KONIEC\n");
+            
             continue;
         }
         start = end;
@@ -40,7 +40,7 @@ int main() {
         while (*start != '\0') {
             if (*start != '\n' && (*start < '0' || *start > '9') && *start != '.' && *start != ' ') {
                 valid = 0;
-                printf("CHYBA\n");
+                
                 start++;
             break;
             }