a-a a-b a-c aaa aab aac aag aah aak aao aar ab- aba abb abc abg abh abk abo abr ac- aca acb acc acg ach ack aco acr ag- aga agb agc agg agh agk ago agr aha ahb ahc ahg ahh ahk aho ahr aka akb akc akg akh akk ako akr aoa aob aoc aog aoh aok aoo aor ar- ara arb arc arg arh ark aro arr baa bab bac bag bah bak bao bar bba bbb bbc bbg bbh bbk bbo bbr bca bcb bcc bcg bch bck bco bcr bga bgb bgc bgg bgh bgk bgo bgr bha bhb bhc bhg bhh bhk bho bhr bka bkb bkc bkg bkk bko bkr boa bob boc bog boh bok boo bor bra brb brg brh brk bro brr c-- caa cab cac cag cah cak cao car cba cbb cbc cbg cbh cbk cbo cbr cca ccb ccc ccg cch cck cco ccr cga cgb cgc cgg cgh cgo cgr ch- cha chb chc chg chh chk cho chr cka ckb ckc ckh cko co- coa cob coc cog coh cok coo cor cra crb crc crg crh crk cro crr gaa gab gac gag gah gak gao gar gba gbc gbg gbh gbk gbo gbr gca gcb gcc gcg gch gck gco gcr gga ggb ggc ggg ggh ggo ggr gha ghb ghc ghg ghh gho ghr gka gkb gkh gko goa gob goc gog goh gok goo gor gra grb grc grg grh grk gro grr haa hab hac hag hah hak hao har hba hbb hbc hbg hbh hbk hbo hbr hca hcb hcc hcg hch hck hco hcr hga hgb hgc hgg hgh hgk hgo hgr hha hhb hhc hhg hhh hhk hho hhr hka hkb hkg hkh hkk hko hkr hoa hob hoc hog hoh hok hoo hor hr- hra hrb hrc hrg hrh hrk hro hrr ka- kaa kab kac kag kah kak kao kar kba kbb kbc kbh kbk kbo kbr kca kcb kcc kcg kch kck kcr kga kgb kgc kgh kgo kha khh khk kho khr kkb kkc kkh kkk kkr koa kob koc kog koh kok koo kor kra krc krg krk kro krr oaa oab oac oag oah oak oao oar ob- oba obb obc obg obh obk obo obr oc- oca ocb occ ocg och ock oco ocr oga ogc ogg ogh ogo oha ohc ohg ohh oho ohr oka okb okc okg okk oko okr oo- ooa oob ooc oog ooh ook ooo oor or- ora orb orc org orh ork oro orr ra- raa rab rac rag rah rak rao rar rba rbb rbc rbg rbh rbk rbo rbr rca rcb rcc rcg rch rco rcr rga rgb rgc rgg rgh rgk rgo rgr rh- rha rhb rhc rhg rhh rho rhr rkb rkc rkg rkk rko roa rob roc rog roh rok roo ror rra rrb rrc rrg rrh rrk rrr

a-ak a-ha a-ok aaaa aaab aaac aaah aaar aaba aabb aabc aabh aaca aacb aacc aach aack aaco aacr aagh aaha aahk aaka aaoo aara aarc aaro abaa abab abac abag abak abar abb- abba abbb abbo abbr abca abcb abcc abch abcr abha abho abhr aboa abob aboh abok aboo abor abra abrc abro acaa acab acac acag acar acba acca accc acch acco acga acgr acha achh acho achr acoa acog acoh acor acr- acra acrc acro acrr ag-o agac agag agao agar agba agbo agca agcc agco agga agha agob agog agoo agra agro ahab ahac ahah ahar ahha ahoa ahog ahok ahor ahra ahrc ahrr akaa akah akao akar akca akha akka akko akok akr- akra aoah aoba aoca aora aorb arab arac arag arah arak arar arba arbh arc- arca arch arco arga argb argh argo arh- arka arkh arko aroa arob aroo aror arr- arra arrc arrg arrh arrk arro arrr baaa baah baak baar baba babb babo babr bac- baca bacc bach back baco baga bagg bagh bago baha baho bahr bak- baka bakh bako bakr baoh bar- bara barb barc barg barh bark baro barr bbbb bbch bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcor bcra bgca bhag bhao bhar bhca bhcc bhog bhor bhra boab boac boag boak boar boba bobb bobo boca boch bock boco boga bogg bogh bogo boha boho bohr boka boko boob booc boog booh book boor bor- bora borg borh bork boro borr brab brac brag brah brak brao brca brcb brka brkb broa brob broc brog broh brok broo bror brrr c-bo caaa caab caac caah caba cabg cabo cac- caca cacc cach cack caco cacr caga cagg cago cagr caha caka caor cara carb carc cark caro carr cbac cbar cbbc cbca cbcc cbcr cbga cbgb cbha cbka cbkg cbko cbkr cbrh ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc ccga ccgc ccha cchr ccob ccoc ccra ccrc ccrg cgac cgcc cgcg cgro chaa chab chac chag chah chak chao char chca chch chgb chha chka chkb choc choh chok choo chor chra chrb chrc chro chrr ckac ckbc ckch ckck ckco ckga ckgo ckoa ckob ckoc ckoo ckor ckrc coag coak coba cobb cobh cobo coca coch cock coco cogh cogo coha coho cok- coka coko coob cooh cook cor- cora corb corc corg cork coro corr crab crac crag crar crbc crca crcc crcr crkc crob croc croh crok croo cror gaar gaba gabb gabo gabr gach gack gaga gagg gago gaha gaoh gara garb garg garo garr gbag gbbo gc-c gcaa gcbc gccc gcoa gcrg gggg gghg ghar goar goba gobo goca goch gocr goga gogh gogo goha gohb goog gook goor gora gorb gorg goro gorr grab grac grbr grcc grob groc grog groh grok groo gror grrr haab haag haak haar haba habo hack haco hag- haga hagg hagh hago haha haho haka hakk hako haor hara harc harh hark haro harr hbag hbar hboc hcbc hcca hccb hccc hcch hcgh hgah hgar hggc