Task: Program Execution
Input (English): 15, 17, ['3203', '333', 'P', '7387', '7657', '9643', '305', '5721', 'n', 'R', '9985', '5683', '2525', '989', 'i', '1727', '1667', 'R', 'U', 'u', 'F']
Output (English): 1667, 1727, i