a-a a-b a-c aaa aab aac aak aam aan aao aau ab- aba abb abc abk abm abn abo abu ac- aca acb acc ack acm acn aco acu aka akb akc akk akm akn ako aku ama amb amc amk amm amn amo amu an- ana anb anc ank anm ann ano anu aoa aob aoc aok aom aon aoo aou au- aua aub auc auk aum aun auo b-u baa bab bac bak bam ban bao bau bba bbb bbc bbk bbm bbn bbo bbu bca bcb bcc bck bcm bcn bco bcu bka bkb bkc bkk bkm bkn bko bma bmb bmc bmk bmm bmn bmo bmu bna bnb bnc bnk bnn bno bnu boa bob boc bok bom bon boo bou bua bub buc buk bum bun buo buu c-- caa cab cac cak cam can cao cau cba cbb cbc cbk cbm cbn cbo cbu cca ccb ccc cck ccm ccn cco ccu cka ckb ckc ckm cko cma cmb cmc cmk cmm cmn cmo cmu cn- cna cnb cnc cnm cnn cno cnu co- coa cob coc cok com con coo cou cua cub cuc cuk cum cun cuo cuu ka- kaa kab kac kak kam kan kao kau kba kbb kbc kbk kbm kbn kbo kbu kca kcb kcc kck kcm kcn kcu kkb kkc kkk kkm kkn kku kma kmb kmc kmk kmm kmo kmu kn- kna knc knk knm knn kno knu koa kob koc kok kom kon koo kou kub kuc kuk kum kun kuu m-o maa mab mac mak mam man mao mau mba mbb mbc mbk mbm mbo mbu mc- mca mcb mcc mck mcm mcn mco mcu mka mkb mkc mkk mkm mkn mko mku mma mmb mmc mmk mmm mmn mmo mmu mna mnb mnc mnk mnm mnn mno mnu moa mob moc mok mom mon moo mou mua mub muc muk mum mun muu naa nab nac nak nam nan nao nau nba nbb nbc nbk nbm nbn nbo nbu nca ncb ncc nck ncm ncn nco ncu nka nkc nkk nkm nkn nko nku nma nmb nmc nmk nmm nmn nmo nmu nna nnb nnc nnk nnm nnn nno nnu no- noa nob noc nok nom non noo nou nua nub nuc nuk num nun nuo nuu oaa oab oac oak oam oan oao oau ob- oba obb obc obk obm obn obo obu oc- oca ocb occ ock ocm ocn oco ocu oka okb okc okk oko oku om- oma omb omc omm omn omo omu on- ona onb onc onk onn ono onu oo- ooa oob ooc ook oom oon ooo ou- oua ouc ouk oum oun ouo ua- uaa uab uac uak uam uan uao uau uba ubb ubc ubk ubn ubo ubu uca ucb ucc uck ucm ucn uco ucu uka ukb ukc ukk ukn uku um- uma umb umc umm umn umo umu un- una unb unc unk unm unn uno unu uoa uob uoc uok uom uon uoo uua uuc uum uun uuu