B3311331313231311331322331333131133132333132333133313223313231322211   >>    B331133131323131133132233133313113313233313233313331322331323132221   <<    B3311331313231311331322331333131133132333132333133313223313231322213   >>      B3311331313231311331322331333131133132333132333133313223313231322212   >>