from itertools import chain
from operator import itemgetter

def g(n):
    for _ in range(n):
        yield map(int, input().split())

l = map(lambda it: list(chain.from_iterable(it)), zip("ABC", g(3)))

for it in sorted(sorted(l, key=itemgetter(2)), key=itemgetter(1), reverse=True):
    print(it[0])