Fix train type detection

run.py

@@ -62,7 +62,7 @@ def update_display(display, dbi):
     if train_type == "Bus":
         display.info_2.set(BUS_REPLACEMENT_TEXT)
     
-    if not train_type[1].isdigit():
+    if not parts[1][0].isdigit():
         # Train number starts with a letter
         train_type = parts[0] = parts[1].rstrip("0123456789")
         parts[1] = parts[1][len(parts[0]):]