# coding: utf-8

d = dict()

nn = int(input())

for i in range(nn):

d[i] = str(input())

d_new = dict()

for k, v in d.items():

l = d[k].split(',')

l_sp = list()

for i in range(len(l)):

l_sp.append(l[i].rpartition('-')[-1].strip())

l_new = list()

for j in range(2, len(l_sp)):

l_new.append(l[j].strip())

d_new[l[0].rpartition('-')[0]] = l_sp

d_lat = dict()

for k, v in d_new.items():

l = d_new[k]

ll = list()

ll = l

for n in range(len(ll)):

key = ll[n].strip()

l_add = list()

l_add.append(k)

if d_lat.get(key):

for i in range(len(l_add)):

l_sup = d_lat[key]

l_sup.append(l_add[i].strip())

d_lat[key] = l_sup

else:

d_lat[key] = l_add

l_k = list()

print(len(d_lat))

for k in d_lat:

l_k.append(k.strip())

l_k = sorted(l_k)

for i in range(len(l_k)):

ll = d_lat[l_k[i]]

l_v = sorted(ll)

#tt = ', '.join(l_v)

tt = l_v[0].strip()

for q in range(1, len(l_v)):

tt = tt + ', ' + l_v[q].strip()

if len(l_v) > 1:

print('{0} - {1}'.format(l_k[i], tt))

else:

print('{0} - {1}'.format(l_k[i], tt))