Create Letter Traingle like =>keralam,kerala,keral,kera,ker,ke,k

Create a pattern like this using php?

keralam
kerala
keral
kera
ker
ke
k

<?php
$state=array('k','e','r','a','l','a','m');

for($i=6;$i>=0;$i--)
{
    $st='';
    for($j=$i;$j>=0;$j--)
    {
        $st=$state[$j].$st;
    }
    echo $st.'</br>';
   
}
echo "</br>";
?>