Task: Program Execution
Input (English): 1, 4, ['N', 'j', 'z', '2909', '1531', '6123', '3067', 'U', '7331', '6527', '7581', 'g', 'u', '8359', 'N', '7005', 'K']
Output (English): N, 1531, 7331, u, K