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