n = int(input())
name_phone_list = []
for i in range(n):
name, phone = input().split()
if len(name) > 10:
name = name[0:10]
if len(phone) > 10:
phone = phone[0:10]
name_phone_list.append( (name, phone) )
print(name_phone_list)
name_phone_list.sort()
for n_p in name_phone_list:
print("%12s%12s" % n_p)