from sys import stdin
from itertools import groupby
from operator import itemgetter, add

groups = stdin.read().split("\n\n")
keys = groups[::2]
values = groups[1::2]
by_key = groupby(sorted(zip(keys, values)), itemgetter(0))
res = {k: reduce(add, (s[1].split("\n") for s in v)) for k, v in by_key}
print res