aaaa aaab aaac aaar aaba aabb aabc aaca aacb aacc aaco aacr aaoo aara aarc aaro abaa abab abac abag abar abb- abba abbb abbo abbr abca abcb abcc abcr aboa abob aboo abor abra abrc abro acaa acab acac acag acar acba acca accc acco acga acgr acoa acog acor acr- acra acrc acro acrr ag-o agac agag agao agar agba agbo agca agcc agco agga agob agog agoo agra agro aoba aoca aora aorb arab arac arag arar arba arc- arca arco arga argb argo aroa arob aroo aror arr- arra arrc arrg arro arrr baaa baar baba babb babo babr bac- baca bacc baco baga bagg bago bar- bara barb barc barg baro barr bbbb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcor bcra bgca boab boac boag boar boba bobb bobo boca boco boga bogg bogo boob booc boog boor bor- bora borg boro borr brab brac brag brao brca brcb broa brob broc brog broo bror brrr c-bo caaa caab caac caba cabg cabo cac- caca cacc caco cacr caga cagg cago cagr caor cara carb carc caro carr cbac cbar cbbc cbca cbcc cbcr cbga cbgb ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc ccga ccgc ccob ccoc ccra ccrc ccrg cgac cgcc cgcg cgro coag coba cobb cobo coca coco cogo coob cor- cora corb corc corg coro corr crab crac crag crar crbc crca crcc crcr crob croc croo cror gaar gaba gabb gabo gabr gaga gagg gago gara garb garg garo garr gbag gbbo gc-c gcaa gcbc gccc gcoa gcrg gggg goar goba gobo goca gocr goga gogo goog goor gora gorb gorg goro gorr grab grac grbr grcc grob groc grog groo gror grrr oara obba obbo obor obra obro ocab ocac ocbc occa occc ocga ocra ocro ocrr ogar ogb ogba ogoa ogog ogra ogro ooaa ooba oocr oooo oora orab orac orao orar orba orbb orbo orca orco orga orgo oro- oror orra orro raab raag raba rabb rabo rac- raca racc raco raga ragg rago raob raoc rara rarb raro rbbb rbbr rcac rcbc rcbo rccb rccc rcga rcgc rcrg rgba roab roag roar rob- roba robb robo roca rocc roco roga rogg rogo roob roog roor rora rorc roro rrrr