Task: Program Execution
Input (English): 15, 21, ['t', 'e', 'U', '5431', '5069', '1987', 'u', 'l', 'd', 't', 'o', '8797', '8283', '8669', '5405', '2539', '3371', 'B', 'b', 'L', 'I', '8271', 'O', 'A', '5183', 'K', 'v', 'w', '3033', '6379']
Output (English): ILbB337125395405