-al -er -ol a-a a-c aaa aac aae aaf aag aal aao aar ac- aca acc ace acf acg acl aco acr aea aec aee aef aeg ael aeo aer af- afa afc afe aff afg afl afo afr ag- aga agc age agf agg agl ago agr al- ala alc ale alf alg all alo alr aoa aoc aoe aof aog aol aoo aor ar- ara arc are arf arg arl aro arr c-- caa cac cae caf cag cal cao car cca ccc cce ccf ccg ccl cco ccr ce- cea cec cee cef ceg cel ceo cer cfa cfc cfe cff cfg cfl cfo cfr cga cgc cge cgg cgl cgo cgr cl- cla clc cle clf clg cll clo clr co- coa coc coe cof cog col coo cor cra crc cre crf crg crl cro crr eaa eac eae eaf eag eal eao ear ec- eca ecc ece ecf ecg ecl eco ecr eea eec eee eef eeg eel eeo eer ef- efa efc efe eff efg efl efo efr ega egc ege egf egg egl ego egr ela elc ele elf elg ell elo elr eo- eoa eoc eoe eof eog eol eoo eor era erc ere erf erg erl ero err faa fac fae faf fag fal fao far fca fcc fce fcf fcg fcl fco fcr fea fec fee fef feg fel feo fer ffa ffc ffe fff ffg ffl ffo ffr fga fgc fge fgf fgg fgl fgr fla flc fle flf flg fll flo flr foa foc foe fof fog fol foo for fra frc fre frf frg frl fro frr gaa gac gae gaf gag gal gao gar gca gcc gce gcf gcg gcl gco gcr ge- gea gec gee gef geg gel geo ger gfa gfc gfe gff gfl gfo gfr gga ggc ggg ggo ggr gla glc gle glf glg gll glo glr goa goc goe gof gog gol goo gor gra grc gre grf grg grl gro grr la- laa lac lae laf lag lal lao lar lca lcc lce lcf lcg lcl lco lcr lea lec lee lef leg lel leo ler lfa lfc lfe lff lfg lfl lfo lfr lga lgc lge lgf lgg lgl lgo lgr lla llc lle llf llg lll llo llr loa loc loe lof log lol loo lor lra lrc lrf lrg lro lrr oaa oac oae oaf oag oal oao oar oc- oca occ ocf ocg ocl oco ocr oea oec oee oef oeg oel oeo oer of- ofa ofc ofe off ofg ofl ofo ofr oga ogc oge ogf ogg ogl ogo ola olc ole olf olg oll olo oo- ooa ooc oof oog ool ooo oor or- ora orc ore orf org orl oro orr ra- raa rac rae raf rag ral rao rar rca rcc rce rcf rcg rcl rco rcr re- rea rec ree ref reg rel reo rer rfa rfc rfe rff rfg rfl rfo rfr rga rgc rge rgf rgg rgo rgr rla rlc rle rlf rlg rll rlo rlr roa roc roe rof rog rol roo ror rra rrc rrf rrg rrl rrr