C1111233131211111211113313331333132213331311212111133132333133311212121   >>    C111123313121111121111331333133313221333131121211113313233313331121212   <<    C1111233131211111211113313331333132213331311212111133132333133311212123   >>      C1111233131211111211113313331333132213331311212111133132333133311212122   >>