N = int(input())
D = {}
S = {}
for i in range(N):
    va = []
    key, *val = input().split()
    val.remove('-')
    for j in val:
        va.append(j.strip(','))
    D[key] = va
for key in D:
    for i in D[key]:
        if i in S:
            S[i] = S[i] + ', ' + key
        else: S[i] = key
print(len(S))
for i in sorted(S):
    print(i + ' - ' + S[i])