Task: Program Execution
Input (English): 4, ['J', '6347', '5173', 'd', '1145', '8381', 'R', '231', '4255', '8713', 'P', 't', '2249', 'n', 'Z', 'e', '4533', 'K', 'l']
Output (English): J, 6347, 5173, d