Task: Program Execution
Input (English): 12, 20, ['R', '3903', 'A', 'T', 'M', 'r', 'j', 'K', '7633', 'i', '487', '9923', 'I', 'j', '5757', '5581', '5005', 'J', '4339', 'R', 'H', 'h', 'o', '5607', 'x']
Output (English): R4339J500555815757jI9923