C1111233131211111211113313331333133313232212111133132333112322333121   >>    C111123313121111121111331333133313331323221211113313233311232233312   <<    C1111233131211111211113313331333133313232212111133132333112322333123   >>      C1111233131211111211113313331333133313232212111133132333112322333122   >>