C11112331312111112111133133313331333133313331333133313331323131333112121   >>    C1111233131211111211113313331333133313331333133313331333132313133311212   <<    C11112331312111112111133133313331333133313331333133313331323131333112123   >>      C11112331312111112111133133313331333133313331333133313331323131333112122   >>