B3311331313231311331322331333132313331322331323133313233211331311331323123111   >>    B331133131323131133132233133313231333132233132313331323321133131133132312311   <<    B3311331313231311331322331333132313331322331323133313233211331311331323123113   >>      B3311331313231311331322331333132313331322331323133313233211331311331323123112   >>