C11111333133313232233133313331333133112111112113313231333131133131231211   >>    C1111133313331323223313331333133313311211111211331323133313113313123121   <<    C11111333133313232233133313331333133112111112113313231333131133131231213   >>      C11111333133313232233133313331333133112111112113313231333131133131231212   >>