<?php

$a = [0b10001000101, 0b10001000011, 0b10000111001];
echo($a[2] - $a[1]);
echo "\n";
echo(mb_ord("й") - mb_ord("у"));
echo "\n";
echo($a[1] - $a[0]);
echo "\n";
echo(mb_ord("у") - mb_ord("х"));