Task: Program Execution
Input (English): 18, 21, ['c', '157', 'P', 'K', 'c', 'y', '4601', 'F', '8205', 'l', '6525', '1023', 'B', '9535', 'X', 'k', 'I', 'k', '4423', '5117', 'i', 'z', 'l']
Output (English): i, 5117, 4423, k