Task: Program Execution
Input (English): 7, 10, ['8103', '4511', 'W', 'w', 'C', 'F', 'O', 'H', 'b', 'I', '3651', 'P', 'c', 'E', '3617', 'Z', '7815', 'Z', '3657', '8291', '2469', 't']
Output (English): O, H, b, I