B3311331313231311331322331333132313132313331323223313233313221323132333231   >>    B331133131323131133132233133313231313231333132322331323331322132313233323   <<    B3311331313231311331322331333132313132313331323223313233313221323132333233   >>      B3311331313231311331322331333132313132313331323223313233313221323132333232   >>