#The collapsed adjacency matrices were computed by C. E. Praeger and L. H. Soicher. mats:=[ [ [ 1, 0, 0 ], [ 0, 1, 0 ], [ 0, 0, 1 ] ], [ [ 0, 11, 0 ], [ 1, 10, 0 ], [ 0, 0, 11 ] ], [ [ 0, 0, 12 ], [ 0, 0, 12 ], [ 1, 11, 0 ] ] ];