B3311331313231311331322331333132313233313233231333133313232213232233121   >>    B331133131323131133132233133313231323331323323133313331323221323223312   <<    B3311331313231311331322331333132313233313233231333133313232213232233123   >>      B3311331313231311331322331333132313233313233231333133313232213232233122   >>