C312312111133131212111133133313331323133313233121111331333133311223213111   >>    C31231211113313121211113313331333132313331323312111133133313331122321311   <<    C312312111133131212111133133313331323133313233121111331333133311223213113   >>      C312312111133131212111133133313331323133313233121111331333133311223213112   >>