Task: Program Execution
Input (English): 12, 21, ['2369', '9675', '2687', 'X', '5187', '1899', 'u', '3423', '5225', 'H', '3061', 'b', '4919', 'd', 'K', '6529', '3775', '6533', 'F', 'I', '8393', '5979']
Output (English): 8393IF653337756529Kd4919b