-al -er -ol a-a a-c aaa aac aae aag aak aal aao aar ac- aca acc ace acg ack acl aco acr aea aec aee aeg aek ael aeo aer ag- aga agc age agg agk agl ago agr aka akc ake akg akk akl ako akr al- ala alc ale alg alk all alo alr aoa aoc aoe aog aok aol aoo aor ar- ara arc are arg ark arl aro arr c-- caa cac cae cag cak cal cao car cca ccc cce ccg cck ccl cco ccr ce- cea cec cee ceg cek cel ceo cer cga cgc cge cgg cgl cgo cgr cka ckc cko cl- cla clc cle clg clk cll clo clr co- coa coc coe cog cok col coo cor cra crc cre crg crk crl cro crr eaa eac eae eag eak eal eao ear ec- eca ecc ece ecg eck ecl eco ecr eea eec eee eeg eek eel eeo eer ega egc ege egg egl ego egr eka ekc eke ekg ekl eko ekr ela elc ele elg elk ell elo elr eo- eoa eoc eoe eog eok eol eoo eor era erc ere erg erk erl ero err gaa gac gae gag gak gal gao gar gca gcc gce gcg gck gcl gco gcr ge- gea gec gee geg gek gel geo ger gga ggc ggg ggo ggr gka gko gla glc gle glg glk gll glo glr goa goc goe gog gok gol goo gor gra grc gre grg grk grl gro grr ka- kaa kac kae kag kak kal kao kar kca kcc kce kcg kck kcl kcr ke- kea kec kee keg kek kel keo ker kga kgc kgl kgo kkc kke kkk kkl kkr kl- kla klc klg klo klr koa koc koe kog kok kol koo kor kra krc krg krk krl kro krr la- laa lac lae lag lak lal lao lar lca lcc lce lcg lck lcl lco lcr lea lec lee leg lek lel leo ler lga lgc lge lgg lgk lgl lgo lgr lka lkg lkl lkr lla llc lle llg llk lll llo llr loa loc loe log lok lol loo lor lra lrc lrg lrk lro lrr oaa oac oae oag oak oal oao oar oc- oca occ ocg ock ocl oco ocr oea oec oee oeg oel oeo oer oga ogc oge ogg ogl ogo oka okc oke okg okk okl oko okr ola olc ole olg olk oll olo oo- ooa ooc oog ook ool ooo oor or- ora orc ore org ork orl oro orr ra- raa rac rae rag rak ral rao rar rca rcc rce rcg rcl rco rcr re- rea rec ree reg rek rel reo rer rga rgc rge rgg rgk rgo rgr rkc rke rkg rkk rko rla rlc rle rlg rll rlo rlr roa roc roe rog rok rol roo ror rra rrc rrg rrk rrl rrr