<?php

// Author: Hannes du Plooy
// Date: 8 October 2013
// Objective: To solve the following
//  ONE
//  ONE
//  ONE
// +ONE
// ----
//  TEN

for($O=1;$O<10;$O++) {
    for($E=0;$E<10;$E++) {
        if ($O != $E) {
            $tmp = $E*4;
            $N = $tmp % 10;
            $carry = ($tmp-$N)/10;
            if ($N == $O || $N == $E) {
                continue;
            }
            $tmp = $carry + $N*4;
            $E2 = $tmp % 10;
            $carry = ($tmp-$E2)/10;
            if ($E2 != $E) {
                continue;
            }
            $T = $carry + $O*4;
            if ($T >= 10) {
                continue;
            }
            if ($T == $O || $T == $E || $T == $N) {
                continue;
            }
            print "Answer is \n\n";
            print " " . $O . $N . $E . "\n";
            print " " . $O . $N . $E . "\n";
            print " " . $O . $N . $E . "\n";
            print "+" . $O . $N . $E . "\n";
            print "----\n";
            print " "  . $T . $E . $N . "\n";
            exit;
        }
    }
}

?>