B3311331313231311331322331333132313233313233313132333133313232233131211   >>    B331133131323131133132233133313231323331323331313233313331323223313121   <<    B3311331313231311331322331333132313233313233313132333133313232233131213   >>      B3311331313231311331322331333132313233313233313132333133313232233131212   >>