C1111233131211111211113313331333133313331333133313331333121111331323112121121   >>    C111123313121111121111331333133313331333133313331333133312111133132311212112   <<    C1111233131211111211113313331333133313331333133313331333121111331323112121123   >>      C1111233131211111211113313331333133313331333133313331333121111331323112121122   >>