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