diff --git a/du5/program.c b/du5/program.c
index d0d1ed0..119c807 100644
--- a/du5/program.c
+++ b/du5/program.c
@@ -29,12 +29,7 @@ struct Node* read_tree(void) {
 
     if (buffer[0] != '*') {
         node->left = read_tree();
-        if (node->left == NULL) {
-            destroy_tree(node);
-            return NULL;
-        }
-        node->right = read_tree();
-        if (node->right == NULL) {
+        if (node->left == NULL || node->right == NULL) {
             destroy_tree(node);
             return NULL;
         }
@@ -60,12 +55,12 @@ void run_system(struct Node* node) {
     if (fgets(answer, SIZE, stdin) == NULL) return;
     answer[strcspn(answer, "\r\n")] = '\0';
 
-    if (strcmp(answer, "y") == 0) {
+    if (strcmp(answer, "a") == 0) {
         run_system(node->left);
     } else if (strcmp(answer, "n") == 0) {
         run_system(node->right);
     } else {
-        printf("I don't understand\n");
+        return;
     }
 }
 
@@ -82,9 +77,9 @@ int main(void) {
         return 1;
     }
     int leaves = count_leaves(root);
-    printf("The Expert System is ready.\n");
-    printf("It knows %d types of fruits and vegetables.\n", leaves);
-    printf("Answer 'y' (yes) or 'n' (no)\n");
+    printf("Expert z bufetu to vie.\n");
+    printf("Pozna %d druhov ovocia a zeleniny.\n", leaves);
+    printf("Odpovedajte 'a' pre prvu moznost alebo 'n' pre druhu moznost.\n");
 
     run_system(root);
     destroy_tree(root);