C11112331312111112111133133313331333132313233313331311331322212231   >>    C1111233131211111211113313331333133313231323331333131133132221223   <<    C11112331312111112111133133313331333132313233313331311331322212233   >>      C11112331312111112111133133313331333132313233313331311331322212232   >>