C11112331312111112111133133313331333132322121111331311331333133313233311231221   >>    C1111233131211111211113313331333133313232212111133131133133313331323331123122   <<    C11112331312111112111133133313331333132322121111331311331333133313233311231223   >>      C11112331312111112111133133313331333132322121111331311331333133313233311231222   >>