Task: Program Execution
Input (English): 9, 9, ['x', '1937', '7591', 'b', '6099', '8585', '9263', '7231', '1503', 'S', 'B', '2431', '5095', 'K', 'O', '5103', '9341', 'F', '3765']
Output (English): 1503