-er a-a a-c aaa aac aae aah aao aar aav ac- aca acc ace ach aco acr acv aea aec aee aeh aeo aer aev aha ahc ahe ahh aho ahr ahv aoa aoc aoe aoh aoo aor aov ar- ara arc are arh aro arr arv av- ava avc ave avh avo avr c-- caa cac cae cah cao car cav cca ccc cce cch cco ccr ccv ce- cea cec cee ceh ceo cer cev ch- cha chc che chh cho chr chv co- coa coc coe coh coo cor cov cra crc cre crh cro crr crv cva cvc cve cvh cvo cvr cvv eaa eac eae eah eao ear eav ec- eca ecc ece ech eco ecr ecv eea eec eee eeo eer eev eha ehc ehe ehh eho ehr ehv eo- eoa eoc eoe eoh eoo eor era erc ere erh ero err erv eva evc eve evh evo evr evv haa hac hae hah hao har hav hca hcc hce hch hco hcr hcv he- hea hec hee heh heo her hev hha hhc hhe hhh hho hhr hhv hoa hoc hoe hoh hoo hor hov hr- hra hrc hre hrh hro hrr hrv hv- hva hvc hvo hvr hvv oaa oac oae oah oao oar oav oc- oca occ och oco ocr ocv oea oec oee oeh oeo oer oha ohc ohe ohh oho ohr oo- ooa ooc ooh ooo oor oov or- ora orc ore orh oro orr orv ov- ova ovc ove ovh ovo ovv ra- raa rac rae rah rao rar rav rca rcc rce rch rco rcr rcv re- rea rec ree reh reo rer rev rh- rha rhc rhe rhh rho rhr rhv roa roc roe roh roo ror rov rra rrc rrh rrr rva rvc rve rvh rvo rvr rvv v-a v-e vaa vac vae vah vao var vav vca vcc vce vch vco vcr vea vec vee veh veo ver vh- vha vhc vhe vho voa voc voe voh voo vor vov vra vrc vre vrh vrr vva vvc vvo vvr vvv