Task: Program Execution
Input (English): 6, 9, ['2585', '9303', '457', '803', 'f', 'K', '871', '8153', 'O', '3501', '5455', 't', '1769', 'M', 'o', '6909', 'k', 'i', 'b', '7349']
Output (English): K, 871, 8153, O