a-a a-b aaa aab aad aah aak aao aar aas aau ab- aba abb abd abh abk abo abr abs abu ad- ada adb add adh adk ado adr ads adu aha ahb ahd ahh ahk aho ahr ahs ahu aka akb akd akh akk ako akr aks aku aoa aob aod aoh aok aoo aor aos aou ar- ara arb ard arh ark aro arr ars aru as- asa asb asd ash ask aso asr ass asu au- aua aub aud auh auk auo aur aus b-u baa bab bad bah bak bao bar bas bau bba bbb bbd bbh bbk bbo bbr bbs bbu bda bdb bdd bdh bdk bdo bdr bds bdu bha bhb bhd bhh bhk bho bhr bhs bhu bka bkb bkk bko bkr bks boa bob bod boh bok boo bor bos bou bra brb brd brh brk bro brr brs bru bsa bsb bsd bsh bsk bso bsr bss bsu bua bub bud buh buk buo bur bus buu daa dab dad dah dak dao dar das dau dba dbb dbd dbh dbk dbo dbr dbs dbu dda ddb ddd ddh ddk ddo ddr dds ddu dh- dha dhb dhd dhh dhk dho dhr dhs dhu dka dkb dkk dko dkr dks dku doa dob dod doh dok doo dor dos dou dra drb drd drk dro drr drs dru dsa dsb dsd dsh dsk dso dsr dss dsu dua dub dud duh duk duo dur dus haa hab had hah hak hao har has hau hba hbb hbd hbh hbk hbo hbr hbs hbu hda hdb hdd hdh hdk hdo hdr hds hdu hha hhb hhd hhh hhk hho hhr hhs hhu hka hkb hkd hkh hkk hko hkr hks hku hoa hob hod hoh hok hoo hor hos hou hr- hra hrb hrd hrh hrk hro hrr hrs hru hsa hsb hsd hsh hsk hsr hss hsu hua hub hud huh huk huo hur hus huu ka- kaa kab kad kah kak kao kar kas kau kba kbb kbd kbh kbk kbo kbr kbs kbu kda kdb kdh kdk kdo kdr kds kdu kha khh khk kho khr khs khu kkb kkh kkk kkr kks kku koa kob kod koh kok koo kor kos kou kra krd krk kro krr krs kru ksa ksb ksd ksh ksk kso ksr kss ksu kub kud kuh kuk kur kus kuu oaa oab oad oah oak oao oar oas oau ob- oba obb obd obh obk obo obr obs obu oda odb odd odh odo odr ods odu oha ohd ohh oho ohr ohs ohu oka okb okd okk oko okr oks oku oo- ooa oob ood ooh ook ooo oor oos or- ora orb ord orh ork oro orr ors oru os- osa osb osd osh osk oso osr oss osu ou- oua oud ouh ouk ouo our ous ra- raa rab rad rah rak rao rar ras rau rba rbb rbd rbh rbk rbo rbr rbs rbu rda rdb rdd rdh rdo rdr rds rdu rh- rha rhb rhd rhh rho rhr rhs rhu rkb rkk rko rks rku roa rob rod roh rok roo ror ros rou rra rrb rrd rrh rrk rrr rrs rru rsa rsb rsd rsh rsk rso rsr rss rsu rua rub rud ruh ruk ruo rur rus ruu saa sab sad sah sak sao sar sas sau sba sbb sbd sbh sbk sbo sbr sbs sbu sda sdb sdd sdh sdk sdo sdr sds sdu sh- sha shb shd shh shk sho shr shs shu sk- ska skb skd skh skk sko skr sks sku soa sob sod soh sok soo sor sos sou sr- sra srb srd srh srk sro srr srs ss- ssa ssb ssd ssh ssk sso ssr sss ssu sua sub sud suh suk suo sur sus suu ua- uaa uab uad uah uak uao uar uas uau uba ubb ubh ubk ubo ubr ubs ubu uda udb udd udk udo udr uds udu uha uhb uhd uhh uho uhr uhs uhu uka ukb ukk ukr uku uoa uob uod uok uoo uor uos ur- ura urb urd urk uro urr urs uru usa usb usd ush usk uso usr uss usu uua uur uus uuu