cvp2:=
[ [ rec(
          lperms := [ [ 1, 2 ], [ 1, 2 ] ],
          rperms := [ [ 1, 2 ], [ 1, 2 ] ] ), rec(
          lperms := [ [ 2, 1 ], [ 2, 1 ] ],
          rperms := [ [ 2, 1 ], [ 2, 1 ] ] ) ], [ rec(
          lperms := [ [ 2, 1 ], [ 2, 1 ] ],
          rperms := [ [ 2, 1 ], [ 2, 1 ] ] ), rec(
          lperms := [ [ 1, 2 ], [ 1, 2 ] ],
          rperms := [ [ 1, 2 ], [ 1, 2 ] ] ) ], [ rec(
          lperms := [ [ 2, 1 ], [ 2, 1 ] ],
          rperms := [ [ 2, 1 ], [ 2, 1 ] ] ), rec(
          lperms := [ [ 2, 1 ], [ 2, 1 ] ],
          rperms := [ [ 2, 1 ], [ 2, 1 ] ] ) ] ]
;