class PBox extends Permutation
{
    static final int [] pbox = 
        { 16,  7, 20, 21,
          29, 12, 28, 17,
           1, 15, 23, 26,
           5, 18, 31, 10,
           2,  8, 24, 14,
          32, 27,  3,  9,
          19, 13, 30,  6,
          22, 11,  4, 25
        } ;

    PBox()
    {
        super( pbox ) ;
    }

}