-er a-a a-c aaa aac aae aag aah aao aar aav ac- aca acc ace acg ach aco acr acv aea aec aee aeg aeh aeo aer aev ag- aga agc age agg agh ago agr agv aha ahc ahe ahg ahh aho ahr ahv aoa aoc aoe aog aoh aoo aor aov ar- ara arc are arg arh aro arr arv av- ava avc ave avg avh avo avr c-- caa cac cae cag cah cao car cav cca ccc cce ccg cch cco ccr ccv ce- cea cec cee ceg ceh ceo cer cev cga cgc cge cgg cgh cgo cgr cgv ch- cha chc che chg chh cho chr chv co- coa coc coe cog coh coo cor cov cra crc cre crg crh cro crr crv cva cvc cve cvg cvh cvo cvr cvv eaa eac eae eag eah eao ear eav ec- eca ecc ece ecg ech eco ecr ecv eea eec eee eeg eeo eer eev ega egc ege egg egh ego egr eha ehc ehe ehg ehh eho ehr ehv eo- eoa eoc eoe eog eoh eoo eor era erc ere erg erh ero err erv eva evc eve evg evh evo evr evv gaa gac gae gag gah gao gar gav gca gcc gce gcg gch gco gcr ge- gea gec gee geg geh geo ger gev gga ggc ggg ggh ggo ggr ggv gha ghc ghe ghg ghh gho ghr goa goc goe gog goh goo gor gov gra grc gre grg grh gro grr grv gva gvc gve gvg gvh gvo gvr haa hac hae hag hah hao har hav hca hcc hce hcg hch hco hcr hcv he- hea hec hee heg heh heo her hev hga hgc hge hgg hgh hgo hgr hgv hha hhc hhe hhg hhh hho hhr hhv hoa hoc hoe hog hoh hoo hor hov hr- hra hrc hre hrg hrh hro hrr hrv hv- hva hvc hvg hvo hvr hvv oaa oac oae oag oah oao oar oav oc- oca occ ocg och oco ocr ocv oea oec oee oeg oeh oeo oer oga ogc oge ogg ogh ogo oha ohc ohe ohg ohh oho ohr oo- ooa ooc oog ooh ooo oor oov or- ora orc ore org orh oro orr orv ov- ova ovc ove ovh ovo ovv ra- raa rac rae rag rah rao rar rav rca rcc rce rcg rch rco rcr rcv re- rea rec ree reg reh reo rer rev rga rgc rge rgg rgh rgo rgr rgv rh- rha rhc rhe rhg rhh rho rhr rhv roa roc roe rog roh roo ror rov rra rrc rrg rrh rrr rva rvc rve rvg rvh rvo rvr rvv v-a v-e vaa vac vae vag vah vao var vav vca vcc vce vch vco vcr vea vec vee veg veh veo ver vga vgc vgg vgh vgo vgr vh- vha vhc vhe vho voa voc voe vog voh voo vor vov vra vrc vre vrg vrh vrr vva vvc vvg vvo vvr vvv