a-a a-b aaa aab aad aah aak aao aas aau ab- aba abb abd abh abk abo abs abu ad- ada adb add adh adk ado ads adu aha ahb ahd ahh ahk aho ahs ahu aka akb akd akh akk ako aks aku aoa aob aod aoh aok aoo aos aou as- asa asb asd ash ask aso ass asu au- aua aub aud auh auk auo aus b-u baa bab bad bah bak bao bas bau bba bbb bbd bbh bbk bbo bbs bbu bda bdb bdd bdh bdk bdo bds bdu bha bhb bhd bhh bhk bho bhs bhu bka bkb bkk bko bks boa bob bod boh bok boo bos bou bsa bsb bsd bsh bsk bso bss bsu bua bub bud buh buk buo bus buu daa dab dad dah dak dao das dau dba dbb dbd dbh dbk dbo dbs dbu dda ddb ddd ddh ddk ddo dds ddu dh- dha dhb dhd dhh dhk dho dhs dhu dka dkb dkk dko dks dku doa dob dod doh dok doo dos dou dsa dsb dsd dsh dsk dso dss dsu dua dub dud duh duk duo dus haa hab had hah hak hao has hau hba hbb hbd hbh hbk hbo hbs hbu hda hdb hdd hdh hdk hdo hds hdu hha hhb hhd hhh hhk hho hhs hhu hka hkb hkd hkh hkk hko hks hku hoa hob hod hoh hok hoo hos hou hsa hsb hsd hsh hsk hss hsu hua hub hud huh huk huo hus huu ka- kaa kab kad kah kak kao kas kau kba kbb kbd kbh kbk kbo kbs kbu kda kdb kdh kdk kdo kds kdu kha khh khk kho khs khu kkb kkh kkk kks kku koa kob kod koh kok koo kos kou ksa ksb ksd ksh ksk kso kss ksu kub kud kuh kuk kus kuu oaa oab oad oah oak oao oas oau ob- oba obb obd obh obk obo obs obu oda odb odd odh odo ods odu oha ohd ohh oho ohs ohu oka okb okd okk oko oks oku oo- ooa oob ood ooh ook ooo oos os- osa osb osd osh osk oso oss osu ou- oua oud ouh ouk ouo ous saa sab sad sah sak sao sas sau sba sbb sbd sbh sbk sbo sbs sbu sda sdb sdd sdh sdk sdo sds sdu sh- sha shb shd shh shk sho shs shu sk- ska skb skd skh skk sko sks sku soa sob sod soh sok soo sos sou ss- ssa ssb ssd ssh ssk sso sss ssu sua sub sud suh suk suo sus suu ua- uaa uab uad uah uak uao uas uau uba ubb ubh ubk ubo ubs ubu uda udb udd udk udo uds udu uha uhb uhd uhh uho uhs uhu uka ukb ukk uku uoa uob uod uok uoo uos usa usb usd ush usk uso uss usu uua uus uuu