B3311331313231311331322331333132313233313233213331333132333132313221311   >>    B331133131323131133132233133313231323331323321333133313233313231322131   <<    B3311331313231311331322331333132313233313233213331333132333132313221313   >>      B3311331313231311331322331333132313233313233213331333132333132313221312   >>