C11112331312111112111133132313331333133313233313331311331321121   >>    C1111233131211111211113313231333133313331323331333131133132112   <<    C11112331312111112111133132313331333133313233313331311331321123   >>      C11112331312111112111133132313331333133313233313331311331321122   >>