Task: Program Execution
Input (English): 14, ['4971', 'e', '2359', '1135', 'S', '3419', 'f', 'h', 'd', '4087', '5861', '7657', '1849', '6569', 'J', 'y', '3469', '7203', 's', '4655', '9473', '8465', '6513', '4551', '7883', '2909', '1137', '3173', 'U', 'i', 'x', 'P', 'K', '3251', 'k', '7009', '3717', 'J', '7373', 'H', 'U', 'K', '4051', '8359']
Output (English): 4971, J, U, 4051