C312312111111331312111133133313331333133322331333131323133313233313112233121   >>    C31231211111133131211113313331333133313332233133313132313331323331311223312   <<    C312312111111331312111133133313331333133322331333131323133313233313112233123   >>      C312312111111331312111133133313331333133322331333131323133313233313112233122   >>