What is the value returned from the following method when it is called with the value $5?$

int mystery$($int $x,$ int $y)$

$\{$

if $)==(0$

return $1$ ;

if $)==(1$

return $x$;

return $x**mystery(x,y-1)$;

$\}$

$33$

$32$

$34$

$31$