Task: Program Execution
Input (English): 18, 20, ['K', '9541', '5545', 'G', 'd', '5833', 'Z', '2725', '3153', 'R', 'Z', '4495', '8667', 'e', 'H', 'C', 'Y', 'B', 'M', 'b', '8031', '6785', 'f', '1155', '5621', 'T']
Output (English): bMB