Task: Program Execution
Input (English): 17, 21, ['i', '3601', '9491', '2269', '6927', 'D', 'N', '3853', '3107', 'Z', '3719', 'S', 'G', '3315', 'R', '8489', 'Z', 'L', 'd', '8187', 'f', '8667', '6173', '2125', 'W']
Output (English): ZLd8187f