B3311331313231311331322331333132313233313233213331333132313331313223311   >>    B331133131323131133132233133313231323331323321333133313231333131322331   <<    B3311331313231311331322331333132313233313233213331333132313331313223313   >>      B3311331313231311331322331333132313233313233213331333132313331313223312   >>