C11112331312111112111133133313331333133112111113331333133313331323223313231111   >>    C1111233131211111211113313331333133313311211111333133313331333132322331323111   <<    C11112331312111112111133133313331333133112111113331333133313331323223313231113   >>      C11112331312111112111133133313331333133112111113331333133313331323223313231112   >>