a-fu aaaa aaab aaaf aaar aaba aabb aafa aafb aaff aaoo aara aaro aaru abaa abab abaf abag abar abau abb- abba abbb abbo abbr abff aboa abob abof aboo abor abou abra abro abua abuf abug afaa afao afar affa affo afgf afoa afog afoo afor afr- afra afro afru afua ag-o agag agao agar agau agba agbo agfa agga aggu agob agog agoo agou agra agro agua agur aoba aora aorb aouf arab araf arag arar arau arba arfa arfb arff arfu arga argb argo aroa arob aroo aror arr- arra arrg arro arrr arru arua arub arug auaa auga aur- aura auro auug baaa baaf baar baba babb babo babr babu baff bafo baga bagg bago bar- bara barb barf barg baro barr baru bau- bauf baug baur bbau bbbb bbga bbrg bfgf boab boag boar boba bobb bobo bobu bofa boff bofu boga bogg bogo boob boof boog boor bor- bora borf borg boro borr boru boua bouf bour brab braf brag brao brau brfu broa brob brog broo bror brou brrr brug buar buba bubb bubo bubu buff bufo bufr buga bugg bugo bur- bura burb burg buro burr buru faaa faba fabo fabu fafa faff fafg fafo fagg fago fagu fara farb farg faro farr faru faur fbar ffar ffff ffrr foaf foar foba fofo fogg fogo foof for- fora forb forg foro forr foua foug four frab frag frau frob frog frou frub frug fuar fubb fubu fuff fufu fuga fugo fugu fuor fur- fura furg furo furr gaar gaba gabb gabo gabr gabu gafa gafb gaff gaga gagg gago gagu gara garb garf garg garo garr gaua gaub gaur gbag gbbo gffa gfoa gfor ggfg gggg goaf goar goba gobo goff gofr gofu goga gogo goof goog goor gora gorb gorf gorg goro gorr gou- gouf goug gour grab graf grau grbr grfa grob grof grog groo gror grou grrr grua grub gruf grug grur guaa guag guao guar guba gubb gubu gufa guff guga gugb gugg gugu gura gurb gurg guro gurr guru oaau oafo oara obba obbo obor obra obro off- offa offo offr offu ofgo ofor ofra ogar ogb ogba ogfr ogoa ogog ogou ogra ogro ooaa ooba ooff oooo oora orab orao orar orba orbb orbo orbu orff orfu orga orgo oro- orof oror orra orro orub ouff our- oura ouro ouu- raab raaf raag raba rabb rabo rabu rafa raff raga ragg rago ragu raob rara rarb rarf raro raua raub rauf rbaf rbbb rbbr rgba roab roaf roag roar rob- roba robb robo robu roff rofo roga rogg rogo roob roof roog roor rora roro roru roua roub rouf rrrr ruag ruba rubb rubu rufa ruff rufo ruga rugg rura ruro ruru uafa uaru uaua ubar ubba ubbo ubra ufag uffa ufra ugab ugao ugar uggo ugra ugro ugur uguu uofa uofg uofo uor- urao urau urba urfa urff urga urgu uro- uroa uroo urra urur uuuu