p0:= PermList([5, 4, 10, 11, 7, 12, 3, 6, 16, 15, 18, 17, 20, 19, 1, 2, 8, 9, 13, 14]);
p1:= PermList([3, 2, 8, 9, 5, 1, 6, 20, 19, 14, 11, 16, 4, 7, 15, 17, 18, 13, 12, 10]);
p2:= PermList([2, 11, 1, 15, 16, 7, 6, 20, 4, 14, 10, 19, 18, 3, 5, 17, 9, 13, 12, 8]);
G:=Group(p0,p1,p2);