B3311331313231311331322331333132313233313231333131123313231323221333223311   >>    B331133131323131133132233133313231323331323133313112331323132322133322331   <<    B3311331313231311331322331333132313233313231333131123313231323221333223313   >>      B3311331313231311331322331333132313233313231333131123313231323221333223312   >>