B3311331313231311331322331333132313331323131323223313233313221323132313331   >>    B331133131323131133132233133313231333132313132322331323331322132313231333   <<    B3311331313231311331322331333132313331323131323223313233313221323132313333   >>      B3311331313231311331322331333132313331323131323223313233313221323132313332   >>