p0:= PermList([1, 5, 2, 7, 6, 3, 4, 8]);
p1:= PermList([4, 1, 2, 3, 6, 8, 5, 7]);
p2:= PermList([5, 4, 1, 6, 8, 7, 2, 3]);
H:=Group(p0,p1,p2);