a-a a-b a-c aaa aab aac aak aam aan aao aay ab- aba abb abc abk abm abn abo aby ac- aca acb acc ack acm acn aco acy aka akb akc akk akm akn ako ama amb amc amk amm amn amo amy an- ana anb anc ank anm ann ano any aoa aob aoc aok aom aon aoo ay- aya ayc ayk ayn ayo baa bab bac bak bam ban bao bay bba bbb bbc bbk bbm bbn bbo bby bca bcb bcc bck bcm bcn bco bcy bka bkb bkc bkk bkm bkn bko bma bmb bmc bmk bmm bmn bmo bna bnb bnc bnk bnn bno boa bob boc bok bom bon boo boy by- bya byc byk bym byn byo c-- caa cab cac cak cam can cao cay cba cbb cbc cbk cbm cbn cbo cby cca ccb ccc cck ccm ccn cco cka ckb ckc ckm cko cky cma cmb cmc cmk cmm cmn cmo cmy cn- cna cnb cnc cnm cnn cno cny co- coa cob coc cok com con coo coy cya cyb cyc cyk cym cyn cyo ka- kaa kab kac kak kam kan kao kay kba kbb kbc kbk kbm kbn kbo kca kcb kcc kck kcm kcn kkb kkc kkk kkm kkn kky kma kmb kmc kmk kmm kmo kn- kna knc knk knm knn kno koa kob koc kok kom kon koo koy kya kyc kym kyn kyo m-o maa mab mac mak mam man mao may mba mbb mbc mbk mbm mbo mc- mca mcb mcc mck mcm mcn mco mka mkb mkc mkk mkm mkn mko mky mma mmb mmc mmk mmm mmn mmo mna mnb mnc mnk mnm mnn mno moa mob moc mok mom mon moo moy my- mya myb myc myk mym myn myo naa nab nac nak nam nan nao nay nba nbb nbc nbk nbm nbn nbo nca ncb ncc nck ncm ncn nco nka nkc nkk nkm nkn nko nky nma nmb nmc nmk nmm nmn nmo nna nnb nnc nnk nnm nnn nno no- noa nob noc nok nom non noo noy nya nyc nyk nym nyn nyo nyy oaa oab oac oak oam oan oao ob- oba obb obc obk obm obn obo oby oc- oca ocb occ ock ocm ocn oco oka okb okc okk oko om- oma omb omc omm omn omo omy on- ona onb onc onk onn ono ony oo- ooa oob ooc ook oom oon ooo oya oyo yaa yab yac yak yam yan yao yay ybc ybm yby yca ycc yco ycy yka ykk ykm ykn yma ymc ymm ymo yna ynk ynn yny yob yoc yok yom yon yoo yoy yyb yyc yyy