-ic a-a a-b a-c a-i aaa aab aac aah aai aak aao ab- aba abb abc abh abi abk abo ac- aca acb acc ach aci ack aco aha ahb ahc ahh ahi ahk aho ai- aia aib aic aih aii aik aio aka akb akc akh aki akk ako aoa aob aoc aoh aoi aok aoo baa bab bac bah bai bak bao bba bbb bbc bbh bbi bbk bbo bca bcb bcc bch bci bck bco bha bhb bhc bhh bhi bhk bho bi- bia bib bic bih bii bik bio bka bkb bkc bkk bko boa bob boc boh boi bok boo c-- caa cab cac cah cai cak cao cba cbb cbc cbh cbi cbk cbo cca ccb ccc cch cci cck cco ch- cha chb chc chh chi chk cho ci- cia cib cic cih cii cik cio cka ckb ckc ckh cki cko co- coa cob coc coh coi cok coo h-i haa hab hac hah hai hak hao hba hbb hbc hbh hbi hbk hbo hca hcb hcc hch hci hck hco hha hhb hhc hhh hhi hhk hho hia hib hic hih hii hik hio hka hkb hkh hki hkk hko hoa hob hoc hoh hoi hok hoo ia- iaa iab iac iah iai iao iba ibb ibc ibh ibi ibk ibo ica icb icc ich ici ick ico iha ihb ihc ihh ihi ihk iho iia iib iic iih iii iio ika ikb ikc iki ikk iko io- ioa iob ioc ioh ioi ioo ka- kaa kab kac kah kai kak kao kba kbb kbc kbh kbi kbk kbo kca kcb kcc kch kci kck kha khh khi khk kho kia kib kic kih kii kik kio kkb kkc kkh kki kkk koa kob koc koh koi kok koo o-i oaa oab oac oah oai oak oao ob- oba obb obc obh obi obk obo oc- oca ocb occ och oci ock oco oha ohc ohh ohi oho oia oib oic oii oik oio oka okb okc oki okk oko oo- ooa oob ooc ooh ooi ook ooo