B3311331313231311331322331333132313331322132333133313232233131231232311   >>    B331133131323131133132233133313231333132213233313331323223313123123231   <<    B3311331313231311331322331333132313331322132333133313232233131231232313   >>      B3311331313231311331322331333132313331322132333133313232233131231232312   >>