Task: Program Execution
Input (English): 1, 8, ['1615', 'F', '2349', '4959', '6003', 'J', '1341', 'm', '4003', 'C', 'r', '1179', 'H', 'l', '2725', 'P', 'x', 'N', '2077', 'h', '4893', 'd', '887', '3183']
Output (English): 1615, 4003, x