import re

d = {}

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

engWord, *latWords = re.split('\ - |, ', input())

for latWord in latWords:

d[latWord] = d.get(latWord, '') + engWord + ', '

print(len(d.keys()))

for latWord in sorted(d):

print(latWord + ' - ' + d[latWord][:-2])