B3311331313231311331322331333132313133313113313113313232233132313132211   >>    B331133131323131133132233133313231313331311331311331323223313231313221   <<    B3311331313231311331322331333132313133313113313113313232233132313132213   >>      B3311331313231311331322331333132313133313113313113313232233132313132212   >>