#!/usr/bin/perl

@lines = <>;

binmode STDOUT;
$x = 1;
foreach $ln (@lines) {
  @words = split /\s+/, $ln;
  foreach $word (@words) {
    $index{$word} = $x++;
    $count{$word}++;
  }
}

$idx='';
foreach $key (keys %index) {
  $idx.=pack("N(N/a*)",$index{$key},$key);
}

print STDOUT pack("N",length($idx)),$idx;

foreach $ln (@lines) {
  @words = split /\s+/, $ln;
  foreach $word (@words) {
    print STDOUT pack("N",$index{$word});
  }
}