#!/usr/bin/env python

import sys

last_key = None
count_val = 0
for line in sys.stdin:
  (key, val) = line.strip().split("\t")
  if last_key and last_key != key:
    print "%s\t%s" % (last_key, count_val)
    count_val = 0

  count_val += 1
  last_key = key

if last_key:
  print "%s\t%s" % (last_key, count_val)