#!/usr/bin/perl -w

use strict;

my %counter;

print "\@ARGV is (@ARGV)\n";

while (<>) {
	for my $word (split) {
		$counter{$word} ++;
	}
}

for (sort { $counter{$b} <=> $counter{$a} } keys %counter) {
	print "'$_' occurred $counter{$_} time",
		$counter{$_} == 1 ? "\n" : "s\n";
}