Task: Program Execution
Input (English): 10, 10, ['415', '7115', 'K', '8469', 'z', '3661', '5457', '7923', 'n', 'B', 'K', 'S', '7029', '1275', '2439', 'i', '4267', 'L', 'l', '5283', 'D', '1691', 'w']
Output (English): B