C11112331312111112111133133313331333132323133313331311222112131   >>    C1111233131211111211113313331333133313232313331333131122211213   <<    C11112331312111112111133133313331333132323133313331311222112133   >>      C11112331312111112111133133313331333132323133313331311222112132   >>