-er a-a a-b aaa aab aae aaf aag aao aar aau ab- aba abb abe abf abg abo abr abu aea aeb aee aef aeg aeo aer aeu af- afa afb afe aff afg afo afr afu ag- aga agb age agf agg ago agr agu aoa aob aoe aof aog aoo aor aou ar- ara arb are arf arg aro arr aru au- aua aub aue auf aug auo aur b-u baa bab bae baf bag bao bar bau bba bbb bbe bbf bbg bbo bbr bbu be- bea beb bee bef beg beo ber beu bfa bfb bfe bff bfg bfo bfr bfu bga bgb bge bgf bgg bgo bgr bgu boa bob boe bof bog boo bor bou bra brb bre brf brg bro brr bru bua bub bue buf bug buo bur buu eaa eab eae eaf eag eao ear eau eba ebb ebe ebf ebg ebo ebr ebu eea eeb eee eef eeg eeo eer ef- efa efb efe eff efg efo efr ega egb ege egf egg ego egr egu eo- eoa eob eoe eof eog eoo eor eou era erb ere erf erg ero err eru eu- eua eub eue euf eug eur faa fab fae faf fag fao far fau fba fbb fbe fbf fbg fbo fbr fbu fea feb fee fef feg feo fer feu ffa ffe fff ffg ffo ffr ffu fga fgb fge fgf fgg fgr foa fob foe fof fog foo for fou fra frb fre frf frg fro frr fru fua fub fue fuf fug fuo fur fuu gaa gab gae gaf gag gao gar gau gba gbe gbf gbg gbo gbr gbu ge- gea geb gee gef geg geo ger geu gfa gfb gfe gff gfo gfr gga ggb ggg ggo ggr ggu goa gob goe gof gog goo gor gou gra grb gre grf grg gro grr gru gu- gua gub gue guf gug guo gur guu oaa oab oae oaf oag oao oar oau ob- oba obb obe obf obg obo obr obu oea oeb oee oef oeg oeo oer of- ofa ofb ofe off ofg ofo ofr ofu oga oge ogf ogg ogo oo- ooa oob oof oog ooo oor or- ora orb ore orf org oro orr oru ou- oua oue ouf ouo our ra- raa rab rae raf rag rao rar rau rba rbb rbe rbf rbg rbo rbr rbu re- rea reb ree ref reg reo rer reu rfa rfb rfe rff rfg rfo rfr rfu rga rgb rge rgf rgg rgo rgr roa rob roe rof rog roo ror rou rra rrb rrf rrg rrr rru rua rub rue ruf rug ruo rur ruu ua- uaa uab uae uaf uag uao uar uau uba ubb ube ubf ubg ubo ubr ubu uea ueb uee uef ueg uer ufa ufe uff ufg ufo ufr ufu uga ugb uge ugf ugg ugo ugr ugu uoa uob uoe uog uoo uor ur- ura urb ure urf urg uro urr uru uua uue uug uur uuu

a-be a-fu aaaa aaab aaae aaaf aaar aaba aabb aaea aafa aafb aaff aage aaoe aaoo aara aare aaro aaru abaa abab abae abaf abag abar abau abb- abba abbb abbe abbo abbr abee aber abff aboa abob abof aboo abor abou abra abro abua abue abuf abug aeaf aeer aega aer- aera aero afaa afao afar afee afer affa affo afgf afoa afoe afog afoo afor afr- afra afre afro afru afua afue ag-o agag agao agar agau agba agbo agea agee ager agfa agga agge aggu agob agog agoo agou agra agre agro agua ague agur aoba aoeu aora aorb aouf arab arae araf arag arar arau arba arbe area aree aref areg areo areu arfa arfb arff arfu arga argb arge argo aroa arob aroe aroo aror arr- arra arre arrg arro arrr arru arua arub arue arug auaa aube auer aufe auga auge aur- aura aure auro auug baaa baaf baar baba babb babe babo babr babu baer baff bafo baga bage bagg bago bar- bara barb bare barf barg baro barr baru bau- bauf baug baur bbau bbbb bbeb bbga bbrg beaf beag bear beau beba bebb bebe bebo beeb beef beeg beer befa befe beff befo bega begg bego begu beo- beof beor bera bere berg bero berr beru beur bfgf boab boag boar boba bobb bobe bobo bobu boea boee boef boeo boer bofa bofe boff bofu boga boge bogg bogo boob booe boof boog boor bor- bora bore borf borg boro borr boru boua boue bouf bour brab brae braf brag brao brau brea breb bree bref breg breo brer brfu broa brob broe brog broo bror brou brrr brue brug buar buba bubb bube bubo bubu buea buer bueu bufe buff bufo bufr buga buge bugg bugo bur- bura burb bure burg buro burr buru eaaf eaba eafb eaga eage eara earb eare earo ebba ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeea eeee eefa eefe eega eera eerg eero ef-g efab efbr efeo effa efor efua egaa egae egao egar egba egbe egbu egea egee eger egfr eggb egge eggo ego- egor egra egre eora eore eraf erau erba erbb erbe ereb erer erg- erga ergg ergo erob eroe eroo erra erre erro erua erub erur euba euer euge eur- eura eure euro faaa faba fabe fabo fabu faeb fafa fafe faff fafg fafo fage fagg fago fagu fara farb fare farg faro farr faru faue faur fbar feaf fear feba febo feeb feer fefe feff fefo fege fegg feof fera ferb fere fero ferr feru ffar ffee ffff ffrr foaf foar foba foer fofo foge fogg fogo foof for- fora forb fore forg foro forr foua foug four frab frae frag frau frea free freo frob froe frog frou frub frue frug fuar fubb fubu fuff fufu fuga fuge fugo fugu fuor fur- fura fure furg furo furr gaar gaba gabb gabe gabo gabr gabu gaea gaer gafa gafb gaff gaga gage gagg gago