{var $a = 1}

{$a}
{include "receive2.inc" send $a receive $a}
{$a}


{var $b = 2}
{include "receive2.inc" send $b as $a receive $a}
{$a}

{$b = 3}
{include "receive2.inc" send $b as $a receive $a as $b}
{$b}