Task: Program Execution
Input (English): 20, 20, ['6725', '3011', '8627', '7121', 'b', '9443', 'W', 'B', '9399', 'p', 'S', '4477', 'w', '6053', 'T', 't', 'K', '6133', 'y', 'C', '417']
Output (English): C