C11112331312111112111133133313331333133313132211312111133131133131122112322121   >>    C1111233131211111211113313331333133313331313221131211113313113313112211232212   <<    C11112331312111112111133133313331333133313132211312111133131133131122112322123   >>      C11112331312111112111133133313331333133313132211312111133131133131122112322122   >>