C11112331312111112111133132313331333133313233313331311332322123221   >>    C1111233131211111211113313231333133313331323331333131133232212322   <<    C11112331312111112111133132313331333133313233313331311332322123223   >>      C11112331312111112111133132313331333133313233313331311332322123222   >>