C111123313121111121111331333133313331333112221211111133132321111
>>
C11112331312111112111133133313331333133311222121111113313232111
<<
C111123313121111121111331333133313331333112221211111133132321113
>>
C111123313121111121111331333133313331333112221211111133132321112
>>