Update for repainting.
^= odo
|* a/@tas
|= b/*
- =< a(, (. b)) :: preserve face
+ =- a(, (- b)) :: preserve face
?+ a @
$c @c $da @da $dr @dr $f @f $if @if $is @is $p @p
$u @u $uc @uc $ub @ub $ui @ui $ux @ux $uv @uv $uw @uw
