-ic a-a a-b a-c a-i a-z aaa aab aac aai aak aao aaz ab- aba abb abc abi abk abo abz ac- aca acb acc aci ack aco acz ai- aia aib aic aii aik aio aiz aka akb akc aki akk ako aoa aob aoc aoi aok aoo az- aza azb azi azo azz baa bab bac bai bak bao baz bba bbb bbc bbi bbk bbo bca bcb bcc bci bck bco bcz bi- bia bib bic bii bik bio biz bka bkb bkc bkk bko boa bob boc boi bok boo boz bza bzo bzz c-- caa cab cac cai cak cao caz cba cbb cbc cbi cbk cbo cbz cca ccb ccc cci cck cco ccz ci- cia cib cic cii cik cio cka ckb ckc cki cko co- coa cob coc coi cok coo coz cz- czc czk czo ia- iaa iab iac iai iao iaz iba ibb ibc ibi ibk ibo ibz ica icb icc ici ick ico icz iia iib iic iii iio ika ikb ikc iki ikk iko io- ioa iob ioc ioi ioo iza izi izo izz k-z ka- kaa kab kac kai kak kao kaz kba kbb kbc kbi kbk kbo kbz kca kcb kcc kci kck kia kib kic kii kik kio kiz kkb kkc kki kkk koa kob koc koi kok koo koz kzo o-i oaa oab oac oai oak oao ob- oba obb obc obi obk obo oc- oca ocb occ oci ock oco ocz oia oib oic oii oik oio oiz oka okb okc oki okk oko oo- ooa oob ooc ooi ook ooo oza ozo ozz zaa zab zac zai zak zao zaz zbb zbc zco zia zib zik zio ziz zka zo- zoa zob zoc zoi zok zoo zzz