C11112331312111112111133132313331333133313233313331311331213221   >>    C1111233131211111211113313231333133313331323331333131133121322   <<    C11112331312111112111133132313331333133313233313331311331213223   >>      C11112331312111112111133132313331333133313233313331311331213222   >>