#!/usr/bin/perl

use strict;
use warnings;

our %commands;

open(HISTORY, "$ENV{HOME}/.histfile") || die "Cannot open history file: $!\n";


sub hashValueDescendingNum {
    $commands{$b} <=> $commands{$a};
}

while (<HISTORY>) {
    my $command = $_;

    my @comm = split(' ', $command);

    if ($comm[0] eq "sudo") {
        shift @comm;
    }

    if ($comm[0] eq "..") {
        next;
    }

    $comm[0] =~ s/\.\///;
    
    if (not exists($commands{$comm[0]})) {
        $commands{$comm[0]} = 0;
    }
    $commands{$comm[0]}++;
}

foreach my $key (sort hashValueDescendingNum (keys(%commands))) {
    my $value = sprintf "%8s", $commands{$key};
    print "$value\t$key\n";
}