-vac aaaa aaab aaac aaar aaav aaba aabb aabc aaca aacb aacc aaco aacr aacv aaoo aara aarc aaro aava abaa abab abac abag abar abb- abba abbb abbo abbr abca abcb abcc abcr aboa abob aboo abor abov abra abrc abro abva acaa acab acac acag acar acba acca accc acco acga acgr acoa acog acor acr- acra acrc acro acrr acrv acvv ag-o agac agag agao agar agav agba agbo agca agcc agco agga agob agog agoo agra agro agva 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 arva arvo avab avao avar avcc avco avgo avor avra avro avva avvo baaa baar baba babb babo babr bac- baca bacc baco baga bagg bago bar- bara barb barc barg baro barr bava bbbb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcor bcra bcvo bgca boab boac boag boar boba bobb bobo boca boco boga bogg bogo boob booc boog boor bor- bora borg boro borr bova bovo brab brac brag brao brav 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 cava cavo cbac cbar cbbc cbca cbcc cbcr cbga cbgb cbva cbvb cbvg cbvr ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc cccv ccga ccgc ccob ccoc ccra ccrc ccrg ccvo cgac cgcc cgcg cgro coag coba cobb cobo coca coco cogo coob cor- cora corb corc corg coro corr cova covo crab crac crag crar crbc crca crcc crcr crob croc croo cror cvac cvar cvca cvcc cvra cvrg cvrr gaar gaba gabb gabo gabr gaga gagg gago gara garb garg garo garr garv gava gbag gbbo gc-c gcaa gcbc gccc gcoa gcov gcrg gggg goar goba gobo goca gocr goga gogo goog goor gora gorb gorg goro gorr grab grac grav grbr grcc grob groc grog groo gror grov grrr gvvv 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 orav orba orbb orbo orca orco orga orgo oro- oror orra orro orvr ovar ovo- ovoo ovra raab raag raba rabb rabo rac- raca racc raco racv raga ragg rago raob raoc rara rarb raro rava rbbb rbbr rcac rcbc rcbo rccb rccc rcga rcgc rcrg rcvr rgba roab roag roar rob- roba robb robo roca rocc roco roga rogg rogo roob roog roor rora rorc roro rova rovo rrrr rv-c rvca vaar vaca vaco vag- vaga vagg vara varg varr vava vbcc vbrg vgcc voar voca voga vooc voog voor vor- vora voro vrac vrav vrba vroc vvob vvog vvvv