(?:
    \1 (?:
      \2 \2 (??{ ".{" . 1.5*length($3) . "}" })
      $ (?{ print join(" ", map .5 * length, $1 x 2, $3 x 3, $2 x 4), "\n" })
      |
      \3 \3 (??{ ".{" . 1.5*length($2) . "}" })
      $ (?{ print join(" ", map .5 * length, $1 x 2, $2 x 3, $3 x 4), "\n" })
    )
    |
    \2 (?:
      \1 \1 (??{ ".{" . 1.5*length($3) . "}" })
      $ (?{ print join(" ", map .5 * length, $2 x 2, $3 x 3, $1 x 4), "\n" })
      |
      \3 \3 (??{ ".{" . 1.5*length($1) . "}" })
      $ (?{ print join(" ", map .5 * length, $2 x 2, $1 x 3, $3 x 4), "\n" })
    )
    |
    \3 (?:
      \1 \1 (??{ ".{" . 1.5*length($2) . "}" })
      $ (?{ print join(" ", map .5 * length, $3 x 2, $2 x 3, $1 x 4), "\n" })
      |
      \2 \2 (??{ ".{" . 1.5*length($1) . "}" })
      $ (?{ print join(" ", map .5 * length, $3 x 2, $1 x 3, $2 x 4), "\n" })
    )
  )

##</code><code>##

1220 1320 1420
1220 1980 2840

##</code><code>##

  (?:
    \1 (?:
      \2 \2 (??{ ".{" . 1.5*length($3) . "}" })
      $ (?{ print join(" ", map .5 * length, $1 x 2, $3 x 3, $2 x 4), "\n" })
      |
      \3 \3 (??{ ".{" . 1.5*length($2) . "}" })
      $ (?{ print join(" ", map .5 * length, $1 x 2, $2 x 3, $3 x 4), "\n" })
    )
  )