#!/usr/bin/perl

# Sorts simple semantic versions.

use v5.18;
my @versions = <STDIN>;

sub num {
    $_ = shift;
    s/^v//;
    sprintf "%09i%09i%09i", split /\./;
}

print(grep {s,^,v,} sort {num($a) <=> num($b)} grep {s,^v,,} @versions)