C312312111133131212111133133313231333133313331322331323132313233121   >>    C31231211113313121211113313331323133313331333132233132313231323312   <<    C312312111133131212111133133313231333133313331322331323132313233123   >>      C312312111133131212111133133313231333133313331322331323132313233122   >>