C11112331312111112111133133313331333132323213331333131121333132312323221   >>    C1111233131211111211113313331333133313232321333133313112133313231232322   <<    C11112331312111112111133133313331333132323213331333131121333132312323223   >>      C11112331312111112111133133313331333132323213331333131121333132312323222   >>