-al -er -ol a-a a-c aaa aac aae aak aal aao aar ac- aca acc ace ack acl aco acr aea aec aee aek ael aeo aer aka akc ake akk akl ako akr al- ala alc ale alk all alo alr aoa aoc aoe aok aol aoo aor ar- ara arc are ark arl aro arr c-- caa cac cae cak cal cao car cca ccc cce cck ccl cco ccr ce- cea cec cee cek cel ceo cer cka ckc cko cl- cla clc cle clk cll clo clr co- coa coc coe cok col coo cor cra crc cre crk crl cro crr eaa eac eae eak eal eao ear ec- eca ecc ece eck ecl eco ecr eea eec eee eek eel eeo eer eka ekc eke ekl eko ekr ela elc ele elk ell elo elr eo- eoa eoc eoe eok eol eoo eor era erc ere erk erl ero err ka- kaa kac kae kak kal kao kar kca kcc kce kck kcl kcr ke- kea kec kee kek kel keo ker kkc kke kkk kkl kkr kl- kla klc klo klr koa koc koe kok kol koo kor kra krc krk krl kro krr la- laa lac lae lak lal lao lar lca lcc lce lck lcl lco lcr lea lec lee lek lel leo ler lka lkl lkr lla llc lle llk lll llo llr loa loc loe lok lol loo lor lra lrc lrk lro lrr oaa oac oae oak oal oao oar oc- oca occ ock ocl oco ocr oea oec oee oel oeo oer oka okc oke okk okl oko okr ola olc ole olk oll olo oo- ooa ooc ook ool ooo oor or- ora orc ore ork orl oro orr ra- raa rac rae rak ral rao rar rca rcc rce rcl rco rcr re- rea rec ree rek rel reo rer rkc rke rkk rko rla rlc rle rll rlo rlr roa roc roe rok rol roo ror rra rrc rrk rrl rrr