Task: Program Execution
Input (English): 10, 10, ['9747', 'U', 'a', 'B', 'F', 'a', 'p', '6845', '1757', '2885', '6519', 'x', 'h', 'O', '4997', 'Q', '8719', 'F', 'x', '1783', 'H', 'Y', '8873', 'P', 'z']
Output (English): 2885