C1111233131211111211113313331323133313231333133313223331211331333133311312121   >>    C111123313121111121111331333132313331323133313331322333121133133313331131212   <<    C1111233131211111211113313331323133313231333133313223331211331333133311312123   >>      C1111233131211111211113313331323133313231333133313223331211331333133311312122   >>