company_users

companies = {}

while True:
    data = input().split(" -> ")
    if "End" in data:
        break
    company, id = data
    if company not in companies:
        companies[company] = []
    if id not in companies[company]:
        companies[company].append(id)

for k, v in sorted(companies.items()):
    print(f"{k}\n"+'\n'.join(["-- "+s for s in v]))