a-a a-c aaa aac aad aae aaf aah aak aao ac- aca acc acd ace acf ach ack aco ad- ada adc add ade adf adh adk ado aea aec aed aee aef aeh aek aeo af- afa afc afd afe aff afh afk afo aha ahc ahd ahe ahf ahh ahk aho aka akc akd ake akh akk ako aoa aoc aod aoe aof aoh aok aoo c-- caa cac cad cae caf cah cak cao cca ccc ccd cce ccf cch cck cco cda cdc cdd cde cdf cdh cdk cdo ce- cea cec ced cee cef ceh cek ceo cfa cfc cfd cfe cff cfh cfk cfo ch- cha chc chd che chf chh chk cho cka ckc ckd ckh cko co- coa coc cod coe cof coh cok coo daa dac dad dae daf dah dak dao dca dcc dcd dce dcf dck dco dda ddc ddd dde ddf ddh ddk ddo de- dea dec ded dee def deh dek deo dfa dfc dfd dfe dff dfh dfk dfo dh- dha dhc dhd dhe dhf dhh dhk dho dka dkc dke dkk dko doa doc dod doe dof doh dok doo eaa eac ead eae eaf eah eak eao ec- eca ecc ecd ece ecf ech eck eco ed- eda edc edd ede edf edh edk edo eea eec eed eee eef eek eeo ef- efa efc efd efe eff efh efo eha ehc ehd ehe ehf ehh eho eka ekc ekd eke ekf ekh eko eo- eoa eoc eod eoe eof eoh eok eoo faa fac fad fae faf fah fak fao fca fcc fcd fce fcf fck fco fda fdc fdd fde fdf fdh fdk fdo fea fec fed fee fef feh fek feo ffa ffc ffd ffe fff ffh ffk ffo fha fhc fhe fhf fhh fho fka fkc fkf fkk foa foc foe fof foh fok foo haa hac had hae haf hah hak hao hca hcc hcd hce hcf hch hck hco hda hdc hdd hde hdf hdh hdk hdo he- hea hec hed hee hef heh hek heo hfa hfc hfd hfe hff hfh hfk hfo hha hhc hhd hhe hhf hhh hhk hho hka hkd hkf hkh hkk hko hoa hoc hod hoe hof hoh hok hoo ka- kaa kac kad kae kaf kah kak kao kca kcc kcd kce kch kck kda kdc kde kdf kdh kdk kdo ke- kea kec ked kee kef keh kek keo kfa kfc kfd kff kfh kfo kha khe khf khh khk kho kkc kke kkh kkk koa koc kod koe kof koh kok koo oaa oac oad oae oaf oah oak oao oc- oca occ ocd ocf och ock oco oda odc odd ode odf odh odo oea oec oed oee oef oeh oeo of- ofa ofc ofd ofe off ofo oha ohc ohd ohe ohf ohh oho oka okc okd oke okk oko oo- ooa ooc ood oof ooh ook ooo