B3311331313231311331322331333132313132313331323223313233313221121   >>    B331133131323131133132233133313231313231333132322331323331322112   <<    B3311331313231311331322331333132313132313331323223313233313221123   >>      B3311331313231311331322331333132313132313331323223313233313221122   >>