Can someone review this short ahk script pls

I c&p it from someone. I dont know anything about ahk and chatgpt is useless. It keeps coming up with the "sendinput" variable hasnt been assigned a variable and line 25 not being able to execute. Thanks

$x::

{Loop 2

sleep 1
SendInput e
}

{Loop 5

sleep 1
SendInput r
}

return

$z::

{Loop 2

sleep 1
SendInput r
}

{Loop 5

sleep 1
SendInput e
}

return

F1::Suspend