C11112331312111112111133133313331333132323133313331312113313331232322121   >>    C1111233131211111211113313331333133313232313331333131211331333123232212   <<    C11112331312111112111133133313331333132323133313331312113313331232322123   >>      C11112331312111112111133133313331333132323133313331312113313331232322122   >>