dict = dict()

for _ in range(int(input())):

aword, bwords = input().split(' - ')

bwords = bwords.split(', ')

for bword in bwords:

if bword in dict:

dict[bword] |= set([aword])

else:

dict[bword] = set([aword])

print(len(dict))

for k,v in sorted(dict.items()):

print(k, '-', ', '.join(sorted(v)))