C11112331312111112111133133313331333133313132211312111133132311331121211   >>    C1111233131211111211113313331333133313331313221131211113313231133112121   <<    C11112331312111112111133133313331333133313132211312111133132311331121213   >>      C11112331312111112111133133313331333133313132211312111133132311331121212   >>