Task: Program Execution
Input (English): 13, 15, ['5531', '6685', '1319', '2289', 't', '7789', 't', '7763', '8557', 'W', '3523', 'L', 'M', 'C', '6341', '8223', '2345', 'y', 'u']
Output (English): 6341, C, M