# Instead of these               these or               these?
$lvalue  ?<:= $rvalue;   $lvalue  <:= $rvalue;   $lvalue ?<:  $rvalue;	 
$lvalue  ?>:= $rvalue;   $lvalue <=:= $rvalue;   $lvalue ?>:  $rvalue;	 
$lvalue ?<=:= $rvalue;   $lvalue  >:= $rvalue;   $lvalue ?<=: $rvalue;	 
$lvalue ?>=:= $rvalue;   $lvalue >=:= $rvalue;   $lvalue ?>=: $rvalue;	 
$lvalue ?lt:= $rvalue;   $lvalue lt:= $rvalue;   $lvalue ?lt: $rvalue;	 
$lvalue ?gt:= $rvalue;   $lvalue le:= $rvalue;   $lvalue ?gt: $rvalue;	 
$lvalue ?ge:= $rvalue;   $lvalue gt:= $rvalue;   $lvalue ?ge: $rvalue;	 
$lvalue ?le:= $rvalue;   $lvalue ge:= $rvalue;   $lvalue ?le: $rvalue;