<?php

$message1 = "0@sn9sirppa@#?ia'jgtvryko1";
$message2 = "q8e?wsellecif@#?sel@#?setuotpazdsy0*b9+mw@x1vj";
$message3 = "aopi?sgnirts@#?sedhtg+p9l!";

$keyNumber1 = strlen($message1)/2;
$sousChaine1 = substr($message1,5,$keyNumber1);
$replace1 = str_replace("@#?"," ",$sousChaine1);
$inversion1 = strrev($replace1);

$keyNumber2 = strlen($message2)/2;
$sousChaine2 = substr($message2,5,$keyNumber2);
$replace2 = str_replace("@#?"," ",$sousChaine2);
$inversion2 = strrev($replace2);

$keyNumber3 = strlen($message3)/2;
$sousChaine3 = substr($message3,5,$keyNumber3);
$replace3 = str_replace("@#?"," ",$sousChaine3);
$inversion3 = strrev($replace3);

echo "$inversion1" ." "."$inversion2"." "."$inversion3";

?>