B3311331313231311331322331333132313132313331323223313233313231322331323123121   >>    B331133131323131133132233133313231313231333132322331323331323132233132312312   <<    B3311331313231311331322331333132313132313331323223313233313231322331323123123   >>      B3311331313231311331322331333132313132313331323223313233313231322331323123122   >>