Task: Program Execution
Input (English): 4, 7, ['P', 'Y', 'K', 'K', 'K', '5163', '2651', 't', 'k', '5089', 'W', 'E', 'z', 'Z', 'q', '5453', 'Q', 'L', '297', 'O', 'C', '9025', '9787', '7981']
Output (English): K, W, L