-al -ic -ol a-a a-b a-c a-i aaa aab aac aai aak aal aao aar ab- aba abb abc abi abk abl abo abr ac- aca acb acc aci ack acl aco acr ai- aia aib aic aii aik ail aio air aka akb akc aki akk akl ako akr al- ala alb alc ali alk all alo alr aoa aob aoc aoi aok aol aoo aor ar- ara arb arc ari ark arl aro arr baa bab bac bai bak bal bao bar bba bbb bbc bbi bbk bbl bbo bbr bca bcb bcc bci bck bcl bco bcr bi- bia bib bic bii bik bil bio bir bka bkb bkc bkk bkl bko bkr bla blb blc bli blk bll blo blr boa bob boc boi bok bol boo bor bra brb bri brk brl bro brr c-- caa cab cac cai cak cal cao car cba cbb cbc cbi cbk cbl cbo cbr cca ccb ccc cci cck ccl cco ccr ci- cia cib cic cii cik cil cio cir cka ckb ckc cki cko cl- cla clb clc cli clk cll clo clr co- coa cob coc coi cok col coo cor cra crb crc cri crk crl cro crr ia- iaa iab iac iai ial iao iar iba ibb ibc ibi ibk ibl ibo ibr ica icb icc ici ick icl ico icr iia iib iic iii iil iio iir ika ikb ikc iki ikk ikl iko ikr il- ila ilb ilc ili ilk ill ilo ilr io- ioa iob ioc ioi iol ioo ior ir- ira irb irc iri irk irl iro irr ka- kaa kab kac kai kak kal kao kar kba kbb kbc kbi kbk kbl kbo kbr kca kcb kcc kci kck kcl kcr kia kib kic kii kik kil kio kir kkb kkc kki kkk kkl kkr kl- kla klb klc kli klo klr koa kob koc koi kok kol koo kor kra krc kri krk krl kro krr la- laa lab lac lai lak lal lao lar lba lbb lbc lbi lbk lbl lbo lbr lca lcb lcc lci lck lcl lco lcr lia lib lic lii lik lil lio lir lka lkb lkl lkr lla llb llc lli llk lll llo llr loa lob loc loi lok lol loo lor lra lrb lrc lri lrk lro lrr o-i oaa oab oac oai oak oal oao oar ob- oba obb obc obi obk obl obo obr oc- oca ocb occ oci ock ocl oco ocr oia oib oic oii oik oil oio oir oka okb okc oki okk okl oko okr ola olb olc oli olk oll olo oo- ooa oob ooc ooi ook ool ooo oor or- ora orb orc ori ork orl oro orr ra- raa rab rac rai rak ral rao rar rba rbb rbc rbi rbk rbl rbo rbr rca rcb rcc rci rcl rco rcr ria rib ric rii rik ril rio rir rkb rkc rkk rko rla rlc rli rll rlo rlr roa rob roc roi rok rol roo ror rra rrb rrc rri rrk rrl rrr