diff --git a/cv8/program.c b/cv8/program.c
index c935fa4..a83278c 100644
--- a/cv8/program.c
+++ b/cv8/program.c
@@ -96,6 +96,11 @@ void knowledge_system(struct tree* node) {
         return;
     }
 
+     if (*flag == 0) {
+        printf("%s", node->v);
+        *flag = 1;
+    }
+
     printf("%s", node->v);
     if (node->left == NULL && node->right == NULL) {
         printf("Koniec\n");