Task: Program Execution
Input (English): 3, 7, ['4105', '8785', 'k', 'w', 'o', 'O', 'P', 'S', '2117', 'K', 'U', '4903', 'z', 'E', '5651', '4543', '8203', 'a']
Output (English): k, w, o, O, P