a-a a-b a-c aaa aab aac aad aah aak aau aav ab- aba abb abc abd abh abk abu abv ac- aca acb acc acd ach ack acu acv ad- ada adb adc add adh adk adu adv aha ahb ahc ahd ahh ahk ahu ahv aka akb akc akd akh akk aku akv au- aua aub auc aud auh auk auv av- ava avb avc avd avh avk avu b-u baa bab bac bad bah bak bau bav bba bbb bbc bbd bbh bbk bbu bca bcb bcc bcd bch bck bcu bcv bda bdb bdc bdd bdh bdk bdu bdv bha bhb bhc bhd bhh bhk bhu bhv bka bkb bkc bkk bkv bua bub buc bud buh buk buu bva bvb bvc bvd bvh bvk bvu bvv c-- caa cab cac cad cah cak cau cav cba cbb cbc cbd cbh cbk cbu cbv cca ccb ccc ccd cch cck ccu ccv cda cdb cdc cdd cdh cdk cdu cdv ch- cha chb chc chd chh chk chu chv cka ckb ckc ckd ckh cua cub cuc cud cuh cuk cuu cuv cva cvb cvc cvd cvh cvk cvu cvv daa dab dac dad dah dak dau dav dba dbb dbc dbd dbh dbk dbu dbv dca dcb dcc dcd dck dcu dcv dda ddb ddc ddd ddh ddk ddu dh- dha dhb dhc dhd dhh dhk dhu dka dkb dkc dkk dku dua dub duc dud duh duk duv dva dvb dvc dvd dvh dvk dvu haa hab hac had hah hak hau hav hba hbb hbc hbd hbh hbk hbu hbv hca hcb hcc hcd hch hck hcv hda hdb hdc hdd hdh hdk hdu hdv hha hhb hhc hhd hhh hhk hhu hhv hka hkb hkd hkh hkk hku hua hub huc hud huh huk huu huv hv- hva hvb hvc hvd hvk hvv ka- kaa kab kac kad kah kak kau kav kba kbb kbc kbd kbh kbk kbu kca kcb kcc kcd kch kck kcu kda kdb kdc kdh kdk kdu kha khh khk khu khv kkb kkc kkh kkk kku kkv kub kuc kud kuh kuk kuu kva kvb kvh kvk kvv ua- uaa uab uac uad uah uak uau uav uba ubb ubc ubh ubk ubu ubv uca ucb ucc ucd uch uck ucu ucv uda udb udc udd udk udu udv uha uhb uhc uhd uhh uhu uhv uka ukb ukc ukk uku uua uuc uuu uva uvb uvc uvu uvv v-a vaa vab vac vad vah vak vau vav vba vbc vbd vbh vbk vbv vca vcc vcd vch vcu vdb vdc vdd vdh vdk vdu vdv vh- vha vhb vhc vhd vka vkb vuk vuv vva vvb vvc vvv