a-a a-b a-c aaa aab aac aag aan aao aar ab- aba abb abc abg abn abo abr ac- aca acb acc acg acn aco acr ag- aga agb agc agg agn ago agr an- ana anb anc ang ann ano anr aoa aob aoc aog aon aoo aor ar- ara arb arc arg arn aro arr baa bab bac bag ban bao bar bba bbb bbc bbg bbn bbo bbr bca bcb bcc bcg bcn bco bcr bga bgb bgc bgg bgn bgo bgr bna bnb bnc bng bnn bno bnr boa bob boc bog bon boo bor bra brb brg brn bro brr c-- caa cab cac cag can cao car cba cbb cbc cbg cbn cbo cbr cca ccb ccc ccg ccn cco ccr cga cgb cgc cgg cgn cgo cgr cn- cna cnb cnc cng cnn cno cnr co- coa cob coc cog con coo cor cra crb crc crg crn cro crr gaa gab gac gag gan gao gar gba gbc gbg gbn gbo gbr gca gcb gcc gcg gcn gco gcr gga ggb ggc ggg ggn ggo ggr gna gnb gnc gnn gno gnr goa gob goc gog gon goo gor gra grb grc grg grn gro grr naa nab nac nag nan nao nar nba nbb nbc nbg nbn nbo nbr nca ncb ncc ncg ncn nco ncr nga ngb ngc ngg ngn ngo nna nnb nnc nng nnn nno no- noa nob noc nog non noo nor nra nrb nrc nrg nrn nro nrr oaa oab oac oag oan oao oar ob- oba obb obc obg obn obo obr oc- oca ocb occ ocg ocn oco ocr oga ogc ogg ogn ogo on- ona onb onc ong onn ono onr oo- ooa oob ooc oog oon ooo oor or- ora orb orc org orn oro orr ra- raa rab rac rag ran rao rar rba rbb rbc rbg rbn rbo rbr rca rcb rcc rcg rcn rco rcr rga rgb rgc rgg rgn rgo rgr rna rnb rnc rng rnn rno rnr roa rob roc rog ron roo ror rra rrb rrc rrg rrn rrr

-ana aaaa aaab aaac aaan aaar aaba aabb aabc aaca aacb aacc aacn aaco aacr aana aang aaon aaoo aara aarc aaro abaa abab abac abag aban abar abb- abba abbb abbo abbr abca abcb abcc abcn abcr aboa abob abon aboo abor abra abrc abro acaa acab acac acag acan acar acba acca accc acco acga acgr acoa acog acon acor acr- acra acrc acro acrr ag-o agac agag agan agao agar agba agbo agca agcc agco agga agna agno agob agog agon agoo agra agro ana- anaa anab anac anag anan anao anar anba anbb anbo anca ancc anco ang- anga ango anna annb anno ano- anoa anon anor anrc aoba aoca aonb aono aora aorb aorn arab arac arag aran arar arba arc- arca arco arga argb argo arna arng arno aroa arob aron aroo aror arr- arra arrc arrg arro arrr baaa baan baar baba babb babo babr bac- baca bacc bacn baco baga bagg bagn bago bana banc bang bann bano banr baon bar- bara barb barc barg barn baro barr bbbb bbga bbng bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcor bcra bgan bgca bgon bnoc bnor bnrr boab boac boag boan boar boba bobb bobo boca boco boga bogg bogo bona bonc bong bonn bono boob booc boog boon boor bor- bora borg born boro borr brab brac brag bran brao brca brcb brna brno broa brob broc brog bron broo bror brrr c-bo caaa caab caac caan caba cabg cabo cac- caca cacc caco cacr caga cagg cagn cago cagr cana canc cang cann cano caor cara carb carc carn caro carr cbac cbar cbbc cbca cbcc cbcn cbcr cbga cbgb cbna cbrn ccaa ccab ccac ccag ccar ccba ccbc ccbn ccca cccb cccc ccga ccgc ccna ccnb ccnc ccnr ccob ccoc ccra ccrc ccrg cgac cgcc cgcg cgro cnaa cnac cnag cnbc cnco cnna cnrc cnrr coag coan coba cobb cobo coca coco cogo con- cona conc cong conn cono coob coon cor- cora corb corc corg corn coro corr crab crac crag cran crar crbc crca crcc crcr crna crob croc cron croo cror gaar gaba gabb gabo gabr gaga gagg gago gana ganc gang gann gano gaon gara garb garg garn garo garr gbag gban gbbo gbon gc-c gcaa gcbc gccc gcna gcoa gcrg gggg ggrn gnaa gnac gnar gncc gngc gnoo gnrc gnrr goan goar goba gobo goca gocr goga gogo gon- gona gong gonn gono goog goon goor gora gorb gorg gorn goro gorr grab grac gran grbr grcc grob groc grog gron groo gror grrr naaa naab naac naag naan naar naba nabc nabo naca nacc naco naga nagc nago nan- nana nanb nang nann nano naoc naor nara narc narg narn naro narr nbaa nbar nbbc nbbo nbca nbcc nbco ncaa ncac ncar ncba ncbc ncca nccc nccn nccr ncga ncgr ncna ncnc ncoa ncoc ncor ncra ncrc ngab ngac ngan ngao ngon ngor nngn nnnn noaa noac noba nobc nobo noco noga nogg nogo non- nona nong nonn nono noo- noob noon nooo noor nor- nora norb norc norg norn noro norr nrab nrca nrna nroc nron nrrc oara oban obba obbo obon obor obra obro ocab ocac ocan ocbc occa occc occn ocga ocna ocon ocra ocro ocrr ogar ogb ogba ogna ogoa ogog ogon ogra ogro onab onan onar onc- onca onco onga ongo onna onno onon onor onra ooaa ooba oocr oona oooo oora orab orac oran orao orar orba orbb orbo orca orco orga orgn orgo orna ornc orno oro- oron oror orra orro raab raag raan raba rabb rabo rac- raca racc raco raga ragg rago rana ranc rang rann rano raob raoc rara rarb raro rbbb rbbr rcac rcbc rcbo rccb rccc rcga rcgc rcnr rcon rcrg rgan rgba rnag rnbr rnco roab roag roan roar rob- roba robb robo roca rocc roco roga