Try this

Code:
 on *:text:@wmfind &:%sLchannel: {
  var %a = 1, %b
  while $var(%*,%a) {
    if ( $1 isin $var(%*,%a).value ) {
      %b = $addtok(%b, $var(%*,%a), 32)
    }
    inc %a
  }
  notice $nick ** Results for $1 $+ : $iif(%b, $v1, None)
}