B3311331313231311331322331333132313233313232233133313113313113313232211   >>    B331133131323131133132233133313231323331323223313331311331311331323221   <<    B3311331313231311331322331333132313233313232233133313113313113313232213   >>      B3311331313231311331322331333132313233313232233133313113313113313232212   >>