C11112331312111112111133132313331333133313233313331333132233132231333121   >>    C1111233131211111211113313231333133313331323331333133313223313223133312   <<    C11112331312111112111133132313331333133313233313331333132233132231333123   >>      C11112331312111112111133132313331333133313233313331333132233132231333122   >>