B3311331313231311331322331333132333133313132233133313232233132313121123231   >>    B331133131323131133132233133313233313331313223313331323223313231312112323   <<    B3311331313231311331322331333132333133313132233133313232233132313121123233   >>      B3311331313231311331322331333132333133313132233133313232233132313121123232   >>