C11112331312111112111133132313331333133313233313331333133312213231   >>    C1111233131211111211113313231333133313331323331333133313331221323   <<    C11112331312111112111133132313331333133313233313331333133312213233   >>      C11112331312111112111133132313331333133313233313331333133312213232   >>