C11112331312111112111133133313231333132313331333112211232211211   >>    C1111233131211111211113313331323133313231333133311221123221121   <<    C11112331312111112111133133313231333132313331333112211232211213   >>      C11112331312111112111133133313231333132313331333112211232211212   >>