C11112331312111112111133133313331333132212111133133313113313331333132311312121   >>    C1111233131211111211113313331333133313221211113313331311331333133313231131212   <<    C11112331312111112111133133313331333132212111133133313113313331333132311312123   >>      C11112331312111112111133133313331333132212111133133313113313331333132311312122   >>