-er a-a a-c a-z aaa aac aae aaf aag aao aar aau aaz ac- aca acc ace acf acg aco acr acu acz aea aec aee aef aeg aeo aer aeu aez af- afa afc afe aff afg afo afr afu afz ag- aga agc age agf agg ago agr agu agz aoa aoc aoe aof aog aoo aor aou ar- ara arc are arf arg aro arr aru arz au- aua auc aue auf aug auo aur auz az- aza aze azf azg azo azu azz c-- caa cac cae caf cag cao car cau caz cca ccc cce ccf ccg cco ccr ccu ccz ce- cea cec cee cef ceg ceo cer ceu cez cfa cfc cfe cff cfg cfo cfr cfu cfz cga cgc cge cgg cgo cgr cgu co- coa coc coe cof cog coo cor cou coz cra crc cre crf crg cro crr cru crz cua cuc cue cuf cug cuo cur cuu cuz cz- czc cze czo eaa eac eae eaf eag eao ear eau eaz ec- eca ecc ece ecf ecg eco ecr ecu eea eec eee eef eeg eeo eer ef- efa efc efe eff efg efo efr ega egc ege egf egg ego egr egu eo- eoa eoc eoe eof eog eoo eor eou era erc ere erf erg ero err eru erz eu- eua euc eue euf eug eur eze ezf ezo ezr ezz faa fac fae faf fag fao far fau faz fca fcc fce fcf fcg fco fcr fcu fcz fea fec fee fef feg feo fer feu fez ffa ffc ffe fff ffg ffo ffr ffu ffz fga fgc fge fgf fgg fgr fgz foa foc foe fof fog foo for fou foz fra frc fre frf frg fro frr fru fua fue fuf fug fuo fur fuu gaa gac gae gaf gag gao gar gau gaz gca gcc gce gcf gcg gco gcr gcu ge- gea gec gee gef geg geo ger geu gez gfa gfc gfe gff gfo gfr gfz gga ggc ggg ggo ggr ggu ggz goa goc goe gof gog goo gor gou goz gra grc gre grf grg gro grr gru gu- gua guc gue guf gug guo gur guu guz gza gzo gzr gzu oaa oac oae oaf oag oao oar oau oc- oca occ ocf ocg oco ocr ocu ocz oea oec oee oef oeg oeo oer of- ofa ofc ofe off ofg ofo ofr ofu ofz oga ogc oge ogf ogg ogo oo- ooa ooc oof oog ooo oor or- ora orc ore orf org oro orr oru orz ou- oua ouc oue ouf ouo our oza oze ozo ozu ozz ra- raa rac rae raf rag rao rar rau raz rca rcc rce rcf rcg rco rcr rcu re- rea rec ree ref reg reo rer reu rez rfa rfc rfe rff rfg rfo rfr rfu rfz rga rgc rge rgf rgg rgo rgr roa roc roe rof rog roo ror rou roz rra rrc rrf rrg rrr rru rua ruc rue ruf rug ruo rur ruu ruz rza rze rzo ua- uaa uac uae uaf uag uao uar uau uaz uca ucc uce ucf ucg uco ucr ucu uea uec uee uef ueg uer ufa ufc ufe uff ufg ufo ufr ufu uga ugc uge ugf ugg ugo ugr ugu uoa uoc uoe uog uoo uor ur- ura urc ure urf urg uro urr uru urz uua uuc uue uug uur uuu uza uzo uzu z-g zaa zac zaf zag zao zar zaz zce zco zea zec zee zef zeo zer zez zfa zfc zfr zgg zo- zoa zoc zoe zof zog zoo zor zou zro zuc zug zur zuz zzr zzz