a-a a-b aaa aab aah aak aan aao aas aau ab- aba abb abh abk abn abo abs abu aha ahb ahh ahk ahn aho ahs ahu aka akb akh akk akn ako aks aku an- ana anb anh ank ann ano ans anu aoa aob aoh aok aon aoo aos aou as- asa asb ash ask asn aso ass asu au- aua aub auh auk aun auo aus b-u baa bab bah bak ban bao bas bau bba bbb bbh bbk bbn bbo bbs bbu bha bhb bhh bhk bho bhs bhu bka bkb bkk bkn bko bks bna bnb bnk bnn bno bns bnu boa bob boh bok bon boo bos bou bsa bsb bsh bsk bsn bso bss bsu bua bub buh buk bun buo bus buu haa hab hah hak han hao has hau hba hbb hbh hbk hbn hbo hbs hbu hha hhb hhh hhk hhn hho hhs hhu hka hkb hkh hkk hkn hko hks hku hna hnb hnh hnk hnn hno hns hnu hoa hob hoh hok hon hoo hos hou hsa hsb hsh hsk hsn hss hsu hua hub huh huk hun huo hus huu ka- kaa kab kah kak kan kao kas kau kba kbb kbh kbk kbn kbo kbs kbu kha khh khk khn kho khs khu kkb kkh kkk kkn kks kku kn- kna knk knn kno knu koa kob koh kok kon koo kos kou ksa ksb ksh ksk ksn kso kss ksu kub kuh kuk kun kus kuu naa nab nah nak nan nao nas nau nba nbb nbk nbn nbo nbs nbu nha nhb nhh nhk nhn nhs nhu nka nkk nkn nko nks nku nna nnb nnh nnk nnn nno nns nnu no- noa nob noh nok non noo nos nou nsa nsb nsh nsk nsn nso nss nsu nua nub nuh nuk nun nuo nus nuu oaa oab oah oak oan oao oas oau ob- oba obb obh obk obn obo obs obu oha ohh ohn oho ohs ohu oka okb okk oko oks oku on- ona onb onh onk onn ono ons onu oo- ooa oob ooh ook oon ooo oos os- osa osb osh osk osn oso oss osu ou- oua ouh ouk oun ouo ous saa sab sah sak san sao sas sau sba sbb sbh sbk sbn sbo sbs sbu sh- sha shb shh shk shn sho shs shu sk- ska skb skh skk sko sks sku sna snb snk snn sno sns snu soa sob soh sok son soo sos sou ss- ssa ssb ssh ssk ssn sso sss ssu sua sub suh suk sun suo sus suu ua- uaa uab uah uak uan uao uas uau uba ubb ubh ubk ubn ubo ubs ubu uha uhb uhh uho uhs uhu uka ukb ukk ukn uku un- una unb unh unk unn uno uns unu uoa uob uok uon uoo uos usa usb ush usk usn uso uss usu uua uun uus uuu