#!/usr/bin/perl

# uniq.pl: remove repeated lines.

use strict;
use diagnostics;

$oldline = "";
$n = 1;

while ($line = <>) {
  if ($line eq $oldline) {
    #$n = $n + 1;
    $n++;
  } elsif ($oldline) {
    print " $n $oldline";
    $n = 1;
    $oldline = $line;
  }
}
if ($oldline)
{
  print " $n $line";
}