bbbb bhir bhit bhrt bhur bhut bhuu bibb bibi bihi bihu birb biri birr birt biru bith bitt bitu brih brit brrr bruh brut btrt bttb bubb bubi bubu buhi buhr buir buit buiu bur- burb burh buri burr burt buru but- buti butt h-ii hbit hbtu hhhh hibi hibt hibu hihi hiht hiit hiiu hiri hirt hiru hiti hitt hrib hrit hrtb httr hubb hubi huhi huhu huib huir huit huri hurr hurt huru huth huti hutt hutu huub ibri ibtb ihit ihub iiht iiii iiit iitr iitt iri- irri irti itri itur iuiu rbbb rbbr rhib rib- ribu riht riri rith riti ritt ritu rrrr rubb rubi rubu ruhh ruhi ruhr ruit ruri ruru ruth ruti rutt rutu tbit tbrb thi- thir thri thru thtb thtr thur tibi tibu tiht tihu tiit tiiu tirb tiri tirr tiru tith titi titt titu tri- trib trit trtr trub trut truu ttbb tttt tubb tubr tubu tuht tuhu tuit tuiu turb turi turr turt turu tuti tutt tutu ubbi ubii ubir ubit uhti uhuh uirr urbi urib uriu urrh urri urth urur urut utri utti uttu uuri uuuu