diff --git a/du6/program.c b/du6/program.c
index 7e93f0a..21edbd8 100644
--- a/du6/program.c
+++ b/du6/program.c
@@ -83,12 +83,15 @@ void run_system(Tree *node) {
         return;
     }
 
-    int c = getchar();
+    int c;
 
-    if (c == EOF) {
-        printf("Koniec vstupu\n");
-        return;
-    }
+    do {
+	    c = getchar();
+	    if (c == EOF) {
+		    printf("Koniec vstupu\n");
+		    return;
+	    }
+    } while (c=='\n'  || c=='\r' || c==' ' || c=='\t');
 
     if (c == 'a') {
         run_system(node->left);