C11112331312111112111133133313331333132323133313331333133112232211   >>    C1111233131211111211113313331333133313232313331333133313311223221   <<    C11112331312111112111133133313331333132323133313331333133112232213   >>      C11112331312111112111133133313331333132323133313331333133112232212   >>