diff --git a/u8/program.py b/u8/program.py
index 520b609..a4487a9 100644
--- a/u8/program.py
+++ b/u8/program.py
@@ -17,6 +17,16 @@ def main():
             break
         lines.append(line)
 
+    if not lines:
+        print("Chybna databaza")
+        return
+
+    counts = [0, 0]
+    index = [0]
+
+    root = create_tree(lines, index, counts)
+
+
 
 if __name__ == "__main__":
     main()