C11112331312111112111133133313331333133313132211312111133132231233131221   >>    C1111233131211111211113313331333133313331313221131211113313223123313122   <<    C11112331312111112111133133313331333133313132211312111133132231233131223   >>      C11112331312111112111133133313331333133313132211312111133132231233131222   >>