-er a-a a-b a-c aaa aab aac aae aag aao aar aav ab- aba abb abc abe abg abo abr abv ac- aca acb acc ace acg aco acr acv aea aeb aec aee aeg aeo aer aev ag- aga agb agc age agg ago agr agv aoa aob aoc aoe aog aoo aor aov ar- ara arb arc are arg aro arr arv av- ava avb avc ave avg avo avr baa bab bac bae bag bao bar bav bba bbb bbc bbe bbg bbo bbr bca bcb bcc bce bcg bco bcr bcv be- bea beb bec bee beg beo ber bev bga bgb bgc bge bgg bgo bgr bgv boa bob boc boe bog boo bor bov bra brb bre brg bro brr brv bva bvb bvc bve bvg bvo bvr bvv c-- caa cab cac cae cag cao car cav cba cbb cbc cbe cbg cbo cbr cbv cca ccb ccc cce ccg cco ccr ccv ce- cea ceb cec cee ceg ceo cer cev cga cgb cgc cge cgg cgo cgr cgv co- coa cob coc coe cog coo cor cov cra crb crc cre crg cro crr crv cva cvb cvc cve cvg cvo cvr cvv eaa eab eac eae eag eao ear eav eba ebb ebc ebe ebg ebo ebr ebv ec- eca ecb ecc ece ecg eco ecr ecv eea eeb eec eee eeg eeo eer eev ega egb egc ege egg ego egr eo- eoa eob eoc eoe eog eoo eor era erb erc ere erg ero err erv eva evb evc eve evg evo evr evv gaa gab gac gae gag gao gar gav gba gbc gbe gbg gbo gbr gbv gca gcb gcc gce gcg gco gcr ge- gea geb gec gee geg geo ger gev gga ggb ggc ggg ggo ggr ggv goa gob goc goe gog goo gor gov gra grb grc gre grg gro grr grv gva gvb gvc gve gvg gvo gvr oaa oab oac oae oag oao oar oav ob- oba obb obc obe obg obo obr obv oc- oca ocb occ ocg oco ocr ocv oea oeb oec oee oeg oeo oer oga ogc oge ogg ogo oo- ooa oob ooc oog ooo oor oov or- ora orb orc ore org oro orr orv ov- ova ovb ovc ove ovo ovv ra- raa rab rac rae rag rao rar rav rba rbb rbc rbe rbg rbo rbr rca rcb rcc rce rcg rco rcr rcv re- rea reb rec ree reg reo rer rev rga rgb rgc rge rgg rgo rgr rgv roa rob roc roe rog roo ror rov rra rrb rrc rrg rrr rva rvb rvc rve rvg rvo rvr rvv v-a v-e vaa vab vac vae vag vao var vav vba vbc vbg vbo vbr vbv vca vcc vce vco vcr vea veb vec vee veg veo ver vga vgc vgg vgo vgr voa vob voc voe vog voo vor vov vra vrb vrc vre vrg vrr vva vvb vvc vvg vvo vvr vvv

-vac a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aaca aacb aacc aace aaco aacr aacv aaea aaec aaev aage aaoe aaoo aara aarc aare aaro aava abaa abab abac abae abag abar abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber aboa abob aboo abor abov abra abrc abro abva acaa acab acac acae acag acar acba acca accc acce acco ace- acea acec acer acev acga acgr acoa acoe acog acor acr- acra acrc acre acro acrr acrv acvv aeac aecb aeer aega aer- aera aerc aero aeva ag-o agac agag agao agar agav agba agbo agca agcc agce agco agea agee ager agga agge agob agog agoo agra agre agro agva aoba aoca aoce aora aorb arab arac arae arag arar arba arbe arc- arca arce arco area arec aree areg areo arev arga argb arge argo aroa arob aroe aroo aror arr- arra arrc arre arrg arro arrr arva arve arvo avab avao avar avcc avce avco avea avec aveo aver avgo avor avra avre avro avva avvo baaa baar baba babb babe babo babr bac- baca bacc bace baco baer baga bage bagg bago bar- bara barb barc bare barg baro barr bava bave bbbb bbeb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcec bcer bcor bcra bcvo beag bear beav beba bebb bebe bebo beca beeb beeg beer bega begg bego beo- beor bera berc bere berg bero berr bevo bgca boab boac boag boar boba bobb bobe bobo boca boce boco boea boec boee boeo boer boga boge bogg bogo boob booc booe boog boor bor- bora bore borg boro borr bova bove bovo brab brac brae brag brao brav brca brcb brce brea breb brec bree breg breo brer brev broa brob broc broe brog broo bror brrr c-bo caaa caab caac caba cabe cabg cabo cac- caca cacc cace caco cacr caec caer caga cage cagg cago cagr caor cara carb carc care caro carr cava cave cavo cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbga cbgb cbre cbva cbvb cbve cbvg cbvr ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc cccv ccee ccga ccgc ccob ccoc ccra ccrc ccre ccrg ccvo ceac cear ceba cec- ceca cece ceco ceeb ceec cege cego ceor cer- cera cerc cere cero ceva cevo cgac cgcc cgcg cger cgro coag coba cobb cobe cobo coca coce coco cogo coob cor- cora corb corc core corg coro corr cova cove covo crab crac crag crar crbc crca crcc crce crcr cre- crea creb crec cree creg creo crob croc croe croo cror cvac cvar cvca cvcc cver cvra cvrg cvrr eaba eaca eacc eaec eaga eage eara earb eare earo eave ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco eco- ecog ecra ecrc ecrr ecrv eeca eeea eeee eega eeoc eera eerc eerg