C11112331312111112111133133313231333132313331333112331322212121   >>    C1111233131211111211113313331323133313231333133311233132221212   <<    C11112331312111112111133133313231333132313331333112331322212123   >>      C11112331312111112111133133313231333132313331333112331322212122   >>