aaaa aaab aaac aaar aaba aabb aabc aaca aacb aacc aaco aacr aacu aaoo aara aarc aaro aaru abaa abab abac abag abar abau abb- abba abbb abbo abbr abca abcb abcc abcr aboa abob aboo abor abou abra abrc abro abua abug acaa acab acac acag acar acba acca accc acco accu acga acgr acoa acog acor acou acr- acra acrc acro acrr acu- acuo acur ag-o agac agag agao agar agau agba agbo agca agcc agco agga aggu agob agog agoo agou agra agro agua agur aoba aoca aora aorb arab arac arag arar arau arba arc- arca arco arga argb argo aroa arob aroo aror arr- arra arrc arrg arro arrr arru arua arub arug auaa auca auga aur- aura auro auug baaa baar baba babb babo babr babu bac- baca bacc baco baga bagg bago bar- bara barb barc barg baro barr baru bau- baug baur bbau bbbb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcor bcra bcru bcuc bgca boab boac boag boar boba bobb bobo bobu boca boco bocu boga bogg bogo boob booc boog boor bor- bora borg boro borr boru boua bour brab brac brag brao brau brca brcb broa brob broc brog broo bror brou brrr bruc brug buar buba bubb bubo bubu buca bucc buco bucu buga bugg bugo bur- bura burb burg buro burr buru c-bo caaa caab caac caba cabg cabo cabu cac- caca cacc caco cacr caga cagg cago cagr caor cara carb carc caro carr cauc cauo cbac cbar cbbc cbca cbcc cbcr cbcu cbga cbgb ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc cccu ccga ccgc ccob ccoc ccra ccrc ccrg ccuc cgac cgcc cgcg cgro coag coba cobb cobo cobu coca coco cocu cogo coob cor- cora corb corc corg coro corr coua coub cour crab crac crag crar crau crbc crbu crca crcc crcr crob croc croo cror crub crug cuau cub- cuba cubb cuca cucc cuga cura curb curo curr gaar gaba gabb gabo gabr gabu gaga gagg gago gagu gara garb garg garo garr gaua gaub gaur gbag gbbo gc-c gcaa gcbc gccc gcoa gcrg gggg goar goba gobo goca gocr goga gogo goog goor gora gorb gorg goro gorr gou- goug gour grab grac grau grbr grcc grob groc grog groo gror grou grrr grua grub grug grur guaa guac guag guao guar guba gubb gubu guca guga gugb gugg gugu gura gurb gurg guro gurr guru oaau oara obba obbo obor obra obro ocab ocac ocbc occa occc ocga ocra ocro ocrr ocur ogar ogb ogba ogoa ogog ogou ogra ogro ooaa ooba oocr oooo oora orab orac orao orar orba orbb orbo orbu orca orco orga orgo oro- oror orra orro orub ouac oucc our- oura ouro ouu- raab raag raba rabb rabo rabu rac- raca racc raco racu raga ragg rago ragu raob raoc rara rarb raro raua raub rauc rbbb rbbr rcac rcbc rcbo rccb rccc rcga rcgc rcrg rgba roab roag roar rob- roba robb robo robu roca rocc roco roga rogg rogo roob roog roor rora rorc roro roru roua roub rrrr ruag ruba rubb rubu ruca ruga rugg rura rurc ruro ruru uabc uaca uaoc uarc uaru uaua ubac ubar ubba ubbo uboc ubra ucar ucbc ucca ucrc ucua ugab ugao ugar ugcc ugcg uggo ugra ugro ugur uguu uocc uor- urac urao urau urba urca urga urgu uro- uroa uroo urra urur uuoc uuuu