mat( ( 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,   0,0,0,0,1),
     ( 2,0,0,0,0,1,0,1,0,0,1,0,0,0,0,0,0,   0,0,0,0,0),
     ( 0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,   0,0,0,0,0),
     ( 0,0,0,2,1,0,0,0,0,0,0,0,1,0,0,0,0,   0,0,0,0,0),
     ( 0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,   0,0,1,0,0),
     ( 0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,   0,0,0,0,0),
     ( 0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,   0,0,0,0,0),
     ( 0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,   0,1,0,0,0),
     ( 0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1/10,0,0,0,0 ) )