B3311331313231311331322331333132313331322331323133313233313133313232233112121   >>    B331133131323131133132233133313231333132233132313331323331313331323223311212   <<    B3311331313231311331322331333132313331322331323133313233313133313232233112123   >>      B3311331313231311331322331333132313331322331323133313233313133313232233112122   >>