C11112331312111112111133133313331333132323133313331333131221211232322121   >>    C1111233131211111211113313331333133313232313331333133313122121123232212   <<    C11112331312111112111133133313331333132323133313331333131221211232322123   >>      C11112331312111112111133133313331333132323133313331333131221211232322122   >>