B3311331313231311331322331333132313233313233213331333132313231323132212231   >>    B331133131323131133132233133313231323331323321333133313231323132313221223   <<    B3311331313231311331322331333132313233313233213331333132313231323132212233   >>      B3311331313231311331322331333132313233313233213331333132313231323132212232   >>