Task: Program Execution
Input (English): 16, 21, ['3153', '517', '1831', '8333', '1959', '4231', 'M', 'a', 't', '1207', '6699', '3917', '1903', 'S', 'z', 'I', '317', '6541', 'k', 'L', 'F', '5611', 'z', '7325', 'W', '1715', '3051']
Output (English): FLk1456713I