Task: Program Execution
Input (English): 12, ['3163', 'M', '9621', 'c', 'u', '459', 'U', 'B', '9037', 'X', '4491', 'b', 'X', 'D', '5887', '7471', '9207', '1895', '4497', '9095', 'a', 'I', '743', 's']
Output (English): 3163, X