a-a a-b aaa aab aad aak aan aao aas aay ab- aba abb abd abk abn abo abs aby ad- ada adb add adk adn ado ads ady aka akb akd akk akn ako aks an- ana anb and ank ann ano ans any aoa aob aod aok aon aoo aos as- asa asb asd ask asn aso ass asy ay- aya ayd ayk ayn ayo ays baa bab bad bak ban bao bas bay bba bbb bbd bbk bbn bbo bbs bby bda bdb bdd bdk bdo bds bdy bka bkb bkk bkn bko bks bna bnb bnd bnk bnn bno bns boa bob bod bok bon boo bos boy bsa bsb bsd bsk bsn bso bss bsy by- bya byd byk byn byo bys daa dab dad dak dan dao das day dba dbb dbd dbk dbn dbo dbs dby dda ddb ddd ddk ddn ddo dds ddy dka dkb dkk dko dks dna dnb dnd dnk dnn dno dns dny doa dob dod dok don doo dos doy dsa dsb dsd dsk dsn dso dss dsy dy- dya dyb dyd dyk dyn dyo dys dyy ka- kaa kab kad kak kan kao kas kay kba kbb kbd kbk kbn kbo kbs kda kdb kdk kdo kds kdy kkb kkk kkn kks kky kn- kna knd knk knn kno koa kob kod kok kon koo kos koy ksa ksb ksd ksk ksn kso kss kya kyd kyn kyo kys naa nab nad nak nan nao nas nay nba nbb nbd nbk nbn nbo nbs nda ndb ndd ndk ndn ndo nds ndy nka nkk nkn nko nks nky nna nnb nnk nnn nno nns no- noa nob nod nok non noo nos noy nsa nsb nsd nsk nsn nso nss nsy nya nyd nyk nyn nyo nys nyy oaa oab oad oak oan oao oas ob- oba obb obd obk obn obo obs oby oda odb odd odn odo ods oka okb okd okk oko oks on- ona onb ond onk onn ono ons ony oo- ooa oob ood ook oon ooo oos os- osa osb osd osk osn oso oss oya oyd oyo oys saa sab sad sak san sao sas say sba sbb sbd sbk sbn sbo sbs sby sda sdb sdd sdk sdn sdo sds sdy sk- ska skb skd skk sko sks sky sna snb snd snk snn sno sns sny soa sob sod sok son soo sos soy ss- ssa ssb ssd ssk ssn sso sss sy- sya syb syd syk syn sys yaa yab yad yak yan yao yas yay ybs yby yda ydn ydo yds ydy yka ykk ykn yna ynd ynk ynn yns yny yob yod yok yon yoo yos yoy ysa ysb ysk yso yss ysy yyb yys yyy