#! /usr/bin/perl

use locale;
use strict;

my @prefs;

sub addPref {

    my $pref = shift;
    my $desc = shift;
    my $i;
    for ($i=0; $i< @prefs; ++$i) {
	my @tab = @{$prefs[$i]};
      	if (${@{$prefs[$i]}}[0] =~ /^$pref/) {
     	    ${@{$prefs[$i]}}[1]{$desc}++;
	    return;
	}
    }
    my @new;
    my %hash;

    $hash{$desc}++;
    push(@new, $pref);
    push(@new, \%hash);

    push(@prefs, \@new);
}

sub printPrefs {

    my $i;
    for $i (@prefs) {
	my @tab = @$i;
#	print $tab[0]."\t";
	my $pref = $tab[0];
	my %hash = %{$tab[1]};
	my @keys = keys(%hash);
#	print(@keys."\n");
	my $sum = 0;
	my $key;
	for $key (@keys) {
	    $sum += $hash{$key};
	}
	for $key (@keys) {
	    print $pref."\t";
	    print $key."\t";
	    print $hash{$key}."\t";
	    print $sum."\n";
	}
    }
}

if (@ARGV < 2) {
    print "USAGE: count_prefs.pl MIN_PREF_LEN MAX_PREF_LEN\n";
    exit;
}

my $MIN = shift;
my $MAX = shift;
my $PART = shift;

if ($MIN > $MAX) {
    print "MIN_PREF_LEN > MAX_PREF_LEN! ($MIN > $MAX)\n";
    exit;
}
my $begin = "";
while (<>) {
    my $len = $MIN;
    $_ =~ /(\w+);(.*)$/;
    my $pref = $1;
    my $desc = $2;
    if ($begin eq "")  {
	$begin = substr($pref, 0, $MIN);
    }
    if ($pref !~ /^$begin.*/) {
 	printPrefs();
	undef(@prefs);
	$begin = "";
    }
    while ($len <= $MAX) {
	addPref(substr($pref, 0, $len++), $desc);
    }
}

printPrefs();