Task: Program Execution
Input (English): 7, 19, ['6151', 'l', 'J', 'E', '9937', 'B', '7501', '6221', 'K', '121', '7373', 'f', '2067', 'l', 'k', '3715', 'X', 'K', '7423']
Output (English): 75016221K1217373f2067lk3715XK7423