C11112331312111112111133132313331333133313233313113313223332311   >>    C1111233131211111211113313231333133313331323331311331322333231   <<    C11112331312111112111133132313331333133313233313113313223332313   >>      C11112331312111112111133132313331333133313233313113313223332312   >>