Task: Program Execution
Input (English): 1, ['4751', 'N', 'H', '2089', '8249', '1009', '7819', 'a', 'E', '7843', 'M', 'C', '5075', '3499', 'H', '2053', 'a', 'b', 'm', '491', '2305', 'N']
Output (English): 4751