-er -ic a-a a-b a-c a-i aaa aab aac aae aai aar aav ab- aba abb abc abe abi abr abv ac- aca acb acc ace aci acr acv aea aeb aec aee aei aer aev ai- aia aib aic aie aii air aiv ar- ara arb arc are ari arr arv av- ava avb avc ave avi avr baa bab bac bae bai bar bav bba bbb bbc bbe bbi bbr bca bcb bcc bce bci bcr bcv be- bea beb bec bee bei ber bev bi- bia bib bic bie bii bir biv bra brb bre bri brr brv bva bvb bvc bve bvi bvr bvv c-- caa cab cac cae cai car cav cba cbb cbc cbe cbi cbr cbv cca ccb ccc cce cci ccr ccv ce- cea ceb cec cee cei cer cev ci- cia cib cic cie cii cir civ cra crb crc cre cri crr crv cva cvb cvc cve cvi cvr cvv eaa eab eac eae eai ear eav eba ebb ebc ebe ebi ebr ebv ec- eca ecb ecc ece eci ecr ecv eea eeb eec eee eer eev eia eib eic eie eii eir eiv era erb erc ere eri err erv eva evb evc eve evi evr evv i-v ia- iaa iab iac iae iai iar iav iba ibb ibc ibe ibi ibr ibv ica icb icc ice ici icr icv ie- iea iec iee iei ier iev iia iib iic iie iii iir ir- ira irb irc ire iri irr irv iva ivb ivc ive ivi ivr ivv ra- raa rab rac rae rai rar rav rba rbb rbc rbe rbi rbr rca rcb rcc rce rci rcr rcv re- rea reb rec ree rei rer rev ria rib ric rie rii rir riv rra rrb rrc rri rrr rva rvb rvc rve rvi rvr rvv v-a v-e vaa vab vac vae vai var vav vba vbc vbi vbr vbv vca vcc vce vci vcr vea veb vec vee vei ver vi- via vib vic vie vii vir viv vra vrb vrc vre vri vrr vva vvb vvc vvi vvr vvv