Task: Program Execution
Input (English): 5, 15, ['C', 't', '1983', '9941', '4241', 'k', 'R', '145', 'W', 'y', 'c', 'Y', '2951', 'O', 'N']
Output (English): N, O, 2951, Y, c, y, W, 145, R, k, 4241