Task: Program Execution
Input (English): 3, 8, ['O', '4401', 'q', 'N', 'C', '305', 'U', 'B', '2487', 'r', '107', 'S', '227', '7291', 'U', 'X', '9269', '2095', 'G', 'W', 'q', 'Z']
Output (English): BU503CNq