-ic a-a a-b a-c a-i aaa aab aac aah aai aak aao aar ab- aba abb abc abh abi abk abo abr ac- aca acb acc ach aci ack aco acr aha ahb ahc ahh ahi ahk aho ahr ai- aia aib aic aih aii aik aio air aka akb akc akh aki akk ako akr aoa aob aoc aoh aoi aok aoo aor ar- ara arb arc arh ari ark aro arr baa bab bac bah bai bak bao bar bba bbb bbc bbh bbi bbk bbo bbr bca bcb bcc bch bci bck bco bcr bha bhb bhc bhh bhi bhk bho bhr bi- bia bib bic bih bii bik bio bir bka bkb bkc bkk bko bkr boa bob boc boh boi bok boo bor bra brb brh bri brk bro brr c-- caa cab cac cah cai cak cao car cba cbb cbc cbh cbi cbk cbo cbr cca ccb ccc cch cci cck cco ccr ch- cha chb chc chh chi chk cho chr ci- cia cib cic cih cii cik cio cir cka ckb ckc ckh cki cko co- coa cob coc coh coi cok coo cor cra crb crc crh cri crk cro crr h-i haa hab hac hah hai hak hao har hba hbb hbc hbh hbi hbk hbo hbr hca hcb hcc hch hci hck hco hcr hha hhb hhc hhh hhi hhk hho hhr hia hib hic hih hii hik hio hir hka hkb hkh hki hkk hko hkr hoa hob hoc hoh hoi hok hoo hor hr- hra hrb hrc hrh hri hrk hro hrr ia- iaa iab iac iah iai iao iar iba ibb ibc ibh ibi ibk ibo ibr ica icb icc ich ici ick ico icr iha ihb ihc ihh ihi ihk iho ihr iia iib iic iih iii iio iir ika ikb ikc iki ikk iko ikr io- ioa iob ioc ioh ioi ioo ior ir- ira irb irc iri irk iro irr ka- kaa kab kac kah kai kak kao kar kba kbb kbc kbh kbi kbk kbo kbr kca kcb kcc kch kci kck kcr kha khh khi khk kho khr kia kib kic kih kii kik kio kir kkb kkc kkh kki kkk kkr koa kob koc koh koi kok koo kor kra krc kri krk kro krr o-i oaa oab oac oah oai oak oao oar ob- oba obb obc obh obi obk obo obr oc- oca ocb occ och oci ock oco ocr oha ohc ohh ohi oho ohr oia oib oic oii oik oio oir oka okb okc oki okk oko okr oo- ooa oob ooc ooh ooi ook ooo oor or- ora orb orc orh ori ork oro orr ra- raa rab rac rah rai rak rao rar rba rbb rbc rbh rbi rbk rbo rbr rca rcb rcc rch rci rco rcr rh- rha rhb rhc rhh rhi rho rhr ria rib ric rih rii rik rio rir rkb rkc rkk rko roa rob roc roh roi rok roo ror rra rrb rrc rrh rri rrk rrr