a-a a-b a-c aaa aab aac aad aah aak aan aau ab- aba abb abc abd abh abk abn abu ac- aca acb acc acd ach ack acn acu ad- ada adb adc add adh adk adn adu aha ahb ahc ahd ahh ahk ahn ahu aka akb akc akd akh akk akn aku an- ana anb anc and anh ank ann anu au- aua aub auc aud auh auk aun b-u baa bab bac bad bah bak ban bau bba bbb bbc bbd bbh bbk bbn bbu bca bcb bcc bcd bch bck bcn bcu bda bdb bdc bdd bdh bdk bdu bha bhb bhc bhd bhh bhk bhu bka bkb bkc bkk bkn bna bnb bnc bnd bnk bnn bnu bua bub buc bud buh buk bun buu c-- caa cab cac cad cah cak can cau cba cbb cbc cbd cbh cbk cbn cbu cca ccb ccc ccd cch cck ccn ccu cda cdb cdc cdd cdh cdk cdn cdu ch- cha chb chc chd chh chk chn chu cka ckb ckc ckd ckh cn- cna cnb cnc cnd cnh cnn cnu cua cub cuc cud cuh cuk cun cuu daa dab dac dad dah dak dan dau dba dbb dbc dbd dbh dbk dbn dbu dca dcb dcc dcd dck dcn dcu dda ddb ddc ddd ddh ddk ddn ddu dh- dha dhb dhc dhd dhh dhk dhu dka dkb dkc dkk dku dna dnb dnc dnd dnh dnk dnn dua dub duc dud duh duk dun haa hab hac had hah hak han hau hba hbb hbc hbd hbh hbk hbn hbu hca hcb hcc hcd hch hck hcn hda hdb hdc hdd hdh hdk hdn hdu hha hhb hhc hhd hhh hhk hhn hhu hka hkb hkd hkh hkk hkn hku hna hnb hnc hnd hnh hnk hnn hnu hua hub huc hud huh huk hun huu ka- kaa kab kac kad kah kak kan kau kba kbb kbc kbd kbh kbk kbn kbu kca kcb kcc kcd kch kck kcn kcu kda kdb kdc kdh kdk kdu kha khh khk khn khu kkb kkc kkh kkk kkn kku kn- kna knc knd knk knn knu kub kuc kud kuh kuk kun kuu naa nab nac nad nah nak nan nau nba nbb nbc nbd nbk nbn nbu nca ncb ncc ncd nch nck ncn ncu nda ndb ndc ndd ndh ndk ndn ndu nha nhb nhc nhd nhh nhk nhn nhu nka nkc nkk nkn nku nna nnb nnc nnh nnk nnn nnu nua nub nuc nud nuh nuk nun nuu ua- uaa uab uac uad uah uak uan uau uba ubb ubc ubh ubk ubn ubu uca ucb ucc ucd uch uck ucn ucu uda udb udc udd udk udn udu uha uhb uhc uhd uhh uhu uka ukb ukc ukk ukn uku un- una unb unc und unh unk unn unu uua uuc uun uuu