#!/usr/bin/env php
<?php

$length = 25;

$lines = explode("\n", file_get_contents("input"));
$valid = 0;

for($i=$length; $i<count($lines); $i++) {
	$ival = $lines[$i];

	for($x=$i-$length; $x<$i; $x++) {
		$xval = $lines[$x];

		for($y=$i-$length; $y<$x; $y++) {
			$yval = $lines[$y];
			if(($xval + $yval) == $ival) {
				$valid = $i;
			}
		}
	}

	if($valid != $i)
		break;
}

echo "First number with bad property is {$lines[$valid + 1]}\n";

?>