C11111333133313232233133313331333133112111112113313231333131133131232321   >>    C1111133313331323223313331333133313311211111211331323133313113313123232   <<    C11111333133313232233133313331333133112111112113313231333131133131232323   >>      C11111333133313232233133313331333133112111112113313231333131133131232322   >>