C31232233133313221211113313331333133313331212111112111113331333233231333121211   >>    C3123223313331322121111331333133313331333121211111211111333133323323133312121   <<    C31232233133313221211113313331333133313331212111112111113331333233231333121213   >>      C31232233133313221211113313331333133313331212111112111113331333233231333121212   >>