Task: Program Execution
Input (English): 15, 20, ['2745', '7909', 'P', 'j', '6549', 'Y', 'x', 't', '5133', '4919', 'l', '4849', '1289', 's', '4405', 'G', '3543', 'J', 'K', 'L', 'V']
Output (English): 4405G3543JKL