A:= [[-3, 2, 6,-1, 4, 5, 7,-8], [-5, 6,-3, 1, 2, 7, 4, 8], [-4,-8, 2, 5,-3, 1, 7, 6], [ 4, 6, 8, 2,-1, 5, 7,-3], [ 4, 2, 7, 8, 6,-1,-5,-3], [ 1, 5, 3,-2, 4, 8,-7, 6], [-7,-5, 4, 6,-3, 8, 1, 2], [-5, 2, 3, 6, 4, 7,-1, 8]]: