C111123313121111121111331333133313331333132232233131211111211111111311211   >>    C11112331312111112111133133313331333133313223223313121111121111111131121   <<    C111123313121111121111331333133313331333132232233131211111211111111311213   >>      C111123313121111121111331333133313331333132232233131211111211111111311212   >>