a-do aaaa aaab aaac aaad aaar aaba aabb aabc aabd aaca aacb aacc aacd aaco aacr aada aadc aaoo aara aarc aard aaro abaa abab abac abad abag abar abb- abba abbb abbo abbr abca abcb abcc abcd abcr abda abdo abgd aboa abob abod aboo abor abra abrc abro acaa acab acac acad acag acar acba acca accc accd acco acda acdb acdc acga acgr acoa acod acog acor acr- acra acrc acro acrr adaa adab adac adad adag adao adar adba adbc adcc adda addc addd addo addr adob adoc adod adog adoo ador adra adro ag-o agac agad agag agao agar agba agbo agca agcc agco agda agga agob agod agog agoo agra agro aoba aoca aora aorb arab arac arad arag arar arba arc- arca arco arda ardc ardo arga argb argo aroa arob arod aroo aror arr- arra arrc arrg arro arrr baaa baad baar baba babb babo babr bac- baca bacc baco bada badb badd bado badr baga bagg bago bar- bara barb barc bard barg baro barr bbad bbbb bbdd bbdo bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcda bcor bcra bd-r bdbc bddc bdog bgca boab boac boad boag boar boba bobb bobo boca boco boda bodb bodo boga bogd bogg bogo boob booc bood boog boor bor- bora bord borg boro borr brab brac brad brag brao brca brcb brda brdo broa brob broc brod brog broo bror brrr c-bo c-cd caaa caab caac caba cabg cabo cac- caca cacc caco cacr cada cadc cadd cado cadr caga cagg cago cagr caod caor cara carb carc card caro carr cbac cbar cbbc cbca cbcc cbcr cbdb cbdc cbdo cbga cbgb cbrd ccaa ccab ccac ccad ccag ccar ccba ccbc ccca cccb cccc ccdc ccdr ccga ccgc ccob ccoc ccod ccra ccrc ccrg cd-r cdaa cdac cdad cdba cdda cddb cddr cgac cgcc cgcg cgro coad coag coba cobb cobo coca coco coda codd cogo coob cood cor- cora corb corc cord corg coro corr crab crac crag crar crbc crca crcc crcr crda crdc crob croc crod croo cror d-bo daab daad daag daar daba dabb dabo daca dada dado daga dagg dago dagr dara darb darc dard darg daro darr dbag dbar dbcc dcbc dcca dccb dccc dcdb dcgo dcra dddd ddoc ddrc dgac dgca doab doar doba dobb doca doco dod- doda dodd dodg dodo dog- doga dogg dogo doob dood door dora dorc dord doro dorr draa drab drac drad drag drar drba drbc drca drda drob drod drog drra gaar gaba gabb gabo gabr gada gadd gado gaga gagg gago gara garb gard garg garo garr gbag gbbo gc-c gcaa gcbc gccc gcda gcoa gcrg gdca gddb gdor gdrc gggg goad goar goba gobo goca gocr goda godo goga gogo good goog goor gora gorb gord gorg goro gorr grab grac grad grbr grcc grdc grob groc grod grog groo gror grrr oara obad obba obbo obor obra obro ocab ocac ocad ocbc occa occc ocga ocra ocro ocrr odac odbo odda oddd odoo odor odra ogar ogb ogba ogdc ogoa ogod ogog ogra ogro ooaa ooba oocr ooda oooo oora oord orab orac orad orao orar orba orbb orbo orca orco orda ordo orga orgo oro- oror orra orro raab raad raag raba rabb rabo rac- raca racc raco rada radc radd rado radr raga ragg rago raob raoc rara rarb raro rbbb rbbr rcac rcbc rcbo rccb rccc rcdc rcga rcgc rcrd rcrg rdac rdoc rgba roab road roag roar rob- roba robb robo roca rocc roco roda rodd rodo roga rogg rogo roob rood roog roor rora rorc roro rrad rrrr