-hou bbbb bftt bhff bhot bhut bhuu bobb bobo bobu boff bofh bofu bohm boho boht bohu bomb bomt bomu boob boof booh boom boot botb both boto bott bouf bouh boum bout btob bttb bubb bubo bubu buff bufo buho bum- bumb bumf but- buto butt fbom ffff fftf fobt fofo fomo fomt foof foom foot foth fotm foto fott fout fthm ftub fubb fubu fuff fufu fumo futo futu hbtu hhhh hhof hmhb hmmm hobo hoff hofu hohm hoho hom- homo homu hoof hoom hoot hotb hoth hotm hoto hott hotu houf hout htoh httm hubb hubo huff hufu huhu humf humh humm humo huot huth huto hutt hutu huub mbou mfbm mfou mftf mhmm mmff mmhm mmmh mmmm mobb mobo moff mofo mofu mohm moho moht mohu momo momu moob moot motb moth motm moto mott motu mouf mout mtbo mtff mtom mubo muff mufu muhu mumm mumo mumu muth muto mutt mutu muut obbo obot obuh off- offh offo offu ohho ohob ohoh ohto ohtu ohum ombo ombu omo- omoo omuo ooff ooho oooh oooo ootb otho oto- otof otoh otoo otto ottu ouff out- outb outh outo ouu- t-mo tfot thmb thmt thof thom thoo thot thou thtb thum tmou tmtt tobo tobt tobu toff tofo toft tofu toho tohu tomb tomm tomo tomt toof tooh toom toot toth totm toto tott touh toum tout ttbb ttff tttt tubb tubo tubu tuff tufm tufo tuft tufu tuht tuhu tumb tumu tuto tutt tutu tuum tuuo ubbo ubtf uhoh uhuh umb- umbo umff ummo umut uofm uofo uomo utfo utmb utto uttu uutf uuuu