B3311331313231311331322331333132313331323131323223313232213231323132313221   >>    B331133131323131133132233133313231333132313132322331323221323132313231322   <<    B3311331313231311331322331333132313331323131323223313232213231323132313223   >>      B3311331313231311331322331333132313331323131323223313232213231323132313222   >>