C1111233131211111211113313331333133313331333133313331331121111132223131   >>    C111123313121111121111331333133313331333133313331333133112111113222313   <<    C1111233131211111211113313331333133313331333133313331331121111132223133   >>      C1111233131211111211113313331333133313331333133313331331121111132223132   >>