a-a a-b a-i aaa aab aai aak aan aao aas aay ab- aba abb abi abk abn abo abs aby ai- aia aib aii aik ain aio ais aiy aka akb aki akk akn ako aks an- ana anb ani ank ann ano ans any aoa aob aoi aok aon aoo aos as- asa asb asi ask asn aso ass asy ay- aya ayi ayk ayn ayo ays baa bab bai bak ban bao bas bay bba bbb bbi bbk bbn bbo bbs bby bi- bia bib bii bik bin bio bis biy bka bkb bkk bkn bko bks bna bnb bni bnk bnn bno bns boa bob boi bok bon boo bos boy bsa bsb bsi bsk bsn bso bss bsy by- bya byi byk byn byo bys ia- iaa iab iai ian iao ias iba ibb ibi ibk ibn ibo ibs iby iia iib iii iin iio iis ika ikb iki ikk iko iks in- ina inb ini ink inn ino ins iny io- ioa iob ioi ion ioo ios is- isa isb isi isk isn iso iss isy iya iyo iys iyy ka- kaa kab kai kak kan kao kas kay kba kbb kbi kbk kbn kbo kbs kia kib kii kik kin kio kis kkb kki kkk kkn kks kky kn- kna kni knk knn kno koa kob koi kok kon koo kos koy ksa ksb ksi ksk ksn kso kss kya kyn kyo kys n-i naa nab nai nak nan nao nas nay nba nbb nbi nbk nbn nbo nbs nia nib nii nik nin nio nis nka nki nkk nkn nko nks nky nna nnb nni nnk nnn nno nns no- noa nob noi nok non noo nos noy nsa nsb nsi nsk nsn nso nss nsy nya nyk nyn nyo nys nyy o-i oaa oab oai oak oan oao oas ob- oba obb obi obk obn obo obs oby oia oib oii oik oin oio ois oka okb oki okk oko oks on- ona onb oni onk onn ono ons ony oo- ooa oob ooi ook oon ooo oos os- osa osb osi osk osn oso oss oya oyi oyo oys saa sab sai sak san sao sas say sba sbb sbi sbk sbn sbo sbs sby sia sib sii sik sin sio sis sk- ska skb ski skk sko sks sky sna snb sni snk snn sno sns sny soa sob soi sok son soo sos soy ss- ssa ssb ssi ssk ssn sso sss sy- sya syb syi syk syn sys yaa yab yai yak yan yao yas yay ybi ybs yby yii yin yio yis yka yki ykk ykn yna ynk ynn yns yny yob yoi yok yon yoo yos yoy ysa ysb ysi ysk yso yss ysy yyb yys yyy