[[x/x , x /x , 35/x, 17/x, 16/x, x/x],
 [x/x , 17/14, x   , x   , x   , x/x],
 [x/27, x    , x   , x   , x   , 4/x],
 [x/17, x    , x   , 17/4, x   , x  ],
 [x/x , x /21, x   , x   , x   , x  ],
 [x/x , x /23, x   , x   , x   , x/x]].
