-er a-a a-c aaa aac aae aah aar aav ac- aca acc ace ach acr acv aea aec aee aeh aer aev aha ahc ahe ahh ahr ahv ar- ara arc are arh arr arv av- ava avc ave avh avr c-- caa cac cae cah car cav cca ccc cce cch ccr ccv ce- cea cec cee ceh cer cev ch- cha chc che chh chr chv cra crc cre crh crr crv cva cvc cve cvh cvr cvv eaa eac eae eah ear eav ec- eca ecc ece ech ecr ecv eea eec eee eer eev eha ehc ehe ehh ehr ehv era erc ere erh err erv eva evc eve evh evr evv haa hac hae hah har hav hca hcc hce hch hcr hcv he- hea hec hee heh her hev hha hhc hhe hhh hhr hhv hr- hra hrc hre hrh hrr hrv hv- hva hvc hvr hvv ra- raa rac rae rah rar rav rca rcc rce rch rcr rcv re- rea rec ree reh rer rev rh- rha rhc rhe rhh rhr rhv rra rrc rrh rrr rva rvc rve rvh rvr rvv v-a v-e vaa vac vae vah var vav vca vcc vce vch vcr vea vec vee veh ver vh- vha vhc vhe vra vrc vre vrh vrr vva vvc vvr vvv