C11112331312111112111133132313331333133313233313113313331333131133132223221   >>    C1111233131211111211113313231333133313331323331311331333133313113313222322   <<    C11112331312111112111133132313331333133313233313113313331333131133132223223   >>      C11112331312111112111133132313331333133313233313113313331333131133132223222   >>