-er a-a a-b a-c aaa aab aac aae aag aao aar ab- aba abb abc abe abg abo abr ac- aca acb acc ace acg aco acr aea aeb aec aee aeg aeo aer ag- aga agb agc age agg ago agr aoa aob aoc aoe aog aoo aor ar- ara arb arc are arg aro arr baa bab bac bae bag bao bar bba bbb bbc bbe bbg bbo bbr bca bcb bcc bce bcg bco bcr be- bea beb bec bee beg beo ber bga bgb bgc bge bgg bgo bgr boa bob boc boe bog boo bor bra brb bre brg bro brr c-- caa cab cac cae cag cao car cba cbb cbc cbe cbg cbo cbr cca ccb ccc cce ccg cco ccr ce- cea ceb cec cee ceg ceo cer cga cgb cgc cge cgg cgo cgr co- coa cob coc coe cog coo cor cra crb crc cre crg cro crr eaa eab eac eae eag eao ear eba ebb ebc ebe ebg ebo ebr ec- eca ecb ecc ece ecg eco ecr eea eeb eec eee eeg eeo eer ega egb egc ege egg ego egr eo- eoa eob eoc eoe eog eoo eor era erb erc ere erg ero err gaa gab gac gae gag gao gar gba gbc gbe gbg gbo gbr gca gcb gcc gce gcg gco gcr ge- gea geb gec gee geg geo ger gga ggb ggc ggg ggo ggr goa gob goc goe gog goo gor gra grb grc gre grg gro grr oaa oab oac oae oag oao oar ob- oba obb obc obe obg obo obr oc- oca ocb occ ocg oco ocr oea oeb oec oee oeg oeo oer oga ogc oge ogg ogo oo- ooa oob ooc oog ooo oor or- ora orb orc ore org oro orr ra- raa rab rac rae rag rao rar rba rbb rbc rbe rbg rbo rbr rca rcb rcc rce rcg rco rcr re- rea reb rec ree reg reo rer rga rgb rgc rge rgg rgo rgr roa rob roc roe rog roo ror rra rrb rrc rrg rrr

a-be aaaa aaab aaac aaae aaar aaba aabb aabc aaca aacb aacc aace aaco aacr aaea aaec aage aaoe aaoo aara aarc aare aaro abaa abab abac abae abag abar abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber aboa abob aboo abor abra abrc abro acaa acab acac acae acag acar acba acca accc acce acco ace- acea acec acer acga acgr acoa acoe acog acor acr- acra acrc acre acro acrr aeac aecb aeer aega aer- aera aerc aero ag-o agac agag agao agar agba agbo agca agcc agce agco agea agee ager agga agge agob agog agoo agra agre agro aoba aoca aoce aora aorb arab arac arae arag arar arba arbe arc- arca arce arco area arec aree areg areo arga argb arge argo aroa arob aroe aroo aror arr- arra arrc arre arrg arro arrr 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 bbbb bbeb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcec bcer bcor bcra beag bear beba bebb bebe bebo beca beeb beeg beer bega begg bego beo- beor bera berc bere berg bero berr 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 brab brac brae brag brao brca brcb brce brea breb brec bree breg breo brer 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 cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbga cbgb cbre ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc ccee ccga ccgc ccob ccoc ccra ccrc ccre ccrg ceac cear ceba cec- ceca cece ceco ceeb ceec cege cego ceor cer- cera cerc cere cero cgac cgcc cgcg cger cgro coag coba cobb cobe cobo coca coce coco cogo coob cor- cora corb corc core corg coro corr crab crac crag crar crbc crca crcc crce crcr cre- crea creb crec cree creg creo crob croc croe croo cror eaba eaca eacc eaec eaga eage eara earb eare earo 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 eeca eeea eeee eega eeoc eera eerc eerg eero egaa egae egao egar egba egbe egcc egcg egcr egea egec egee eger eggb egge eggo ego- egor egra egre eora eore erba erbb erbe erca ercc erce ereb erec erer erg- erga ergg ergo erob eroc eroe eroo erra errc erre erro gaar gaba gabb gabe gabo gabr gace gaea gaec gaer gaga gage gagg gago gara garb gare garg garo garr gbag gbbo gc-c gcaa gcbc gccc gcoa gcrg geab gear geba gebe geca gece geer gege gegg gego geo- geog gera gerb gere gero gggg goar goba gobe gobo goca goce gocr goer goga gogo goog goor gora gorb gore gorg goro gorr grab grac grae grbr grcc grce grea greb grec gree greg grob groc grog groo gror grrr o-eo oaer oara oare obba obbo obea obec ober oboe obor obra obre obro ocab ocac ocbc occa occc oce ocee ocga ocra ocre ocro ocrr oec- oeca oecc oeec oegb oera oere ogae ogar ogb ogba ogbe ogea ogee oger ogge ogoa ogog ogra ogre ogro ooaa ooba oobe oocr ooer oooo oora oore orab orac orae orao orar orba orbb orbe orbo orca orce orco ore- orea oreb orec oreg oreo orer orga orge orgo oro- oroe oror orra orro raab raag raba rabb rabe rabo rac- raca racc race raco raec