-er a-a a-b a-i aaa aab aae aaf aag aai aar aau ab- aba abb abe abf abg abi abr abu aea aeb aee aef aeg aei aer aeu af- afa afb afe aff afg afi afr afu ag- aga agb age agf agg agi agr agu ai- aia aib aie aif aig aii air aiu ar- ara arb are arf arg ari arr aru au- aua aub aue auf aug aui aur b-u baa bab bae baf bag bai bar bau bba bbb bbe bbf bbg bbi bbr bbu be- bea beb bee bef beg bei ber beu bfa bfb bfe bff bfg bfi bfr bfu bga bgb bge bgf bgg bgi bgr bgu bi- bia bib bie bif big bii bir biu bra brb bre brf brg bri brr bru bua bub bue buf bug bui bur buu eaa eab eae eaf eag eai ear eau eba ebb ebe ebf ebg ebi ebr ebu eea eeb eee eef eeg eer ef- efa efb efe eff efg efi efr ega egb ege egf egg egi egr egu eia eib eie eif eig eii eir eiu era erb ere erf erg eri err eru eu- eua eub eue euf eug eui eur faa fab fae faf fag fai far fau fba fbb fbe fbf fbg fbi fbr fbu fea feb fee fef feg fei fer feu ffa ffe fff ffg ffi ffr ffu fga fgb fge fgf fgg fgi fgr fia fib fie fif fig fii fir fiu fra frb fre frf frg fri frr fru fua fub fue fuf fug fui fur fuu gaa gab gae gaf gag gai gar gau gba gbe gbf gbg gbi gbr gbu ge- gea geb gee gef geg gei ger geu gfa gfb gfe gff gfi gfr gga ggb ggg ggi ggr ggu gia gib gie gif gig gii gir giu gra grb gre grf grg gri grr gru gu- gua gub gue guf gug gui gur guu i-f ia- iaa iab iae iaf iag iai iar iau iba ibb ibe ibf ibg ibi ibr ibu ie- iea iee ief ieg iei ier ifa ifb ife iff ifg ifi ifr ifu iga igb ige igf igg igi igr igu iia iib iie iif iii iir iiu ir- ira irb ire irf irg iri irr iru iu- iua iub iue iug iui iur ra- raa rab rae raf rag rai rar rau rba rbb rbe rbf rbg rbi rbr rbu re- rea reb ree ref reg rei rer reu rfa rfb rfe rff rfg rfi rfr rfu rga rgb rge rgf rgg rgi rgr ria rib rie rif rig rii rir rra rrb rrf rrg rri rrr rru rua rub rue ruf rug rui rur ruu ua- uaa uab uae uaf uag uai uar uau uba ubb ube ubf ubg ubi ubr ubu uea ueb uee uef ueg uei uer ufa ufe uff ufg ufi ufr ufu uga ugb uge ugf ugg ugi ugr ugu uia uib uie uif uig uii uir uiu ur- ura urb ure urf urg uri urr uru uua uue uug uur uuu

a-be a-fu a-ii aaaa aaab aaae aaaf aaai aaar aaba aabb aabi aaea aafa aafb aaff aafi aage aaib aaii aara aare aari aaru abaa abab abae abaf abag abai abar abau abb- abba abbb abbe abbi abbr abee aber abff abia abib abie abig abir abiu abra abri abua abue abuf abug aeaf aebi aeer aega aer- aera aeri afaa afar afee afer affa affi afgf afia afib afif afig afir afr- afra afre afri afru afua afue agag agai agar agau agba agea agee agei ager agfa agga agge aggi aggu agia agib agie agig agii agir agra agre agri agua ague agui agur aiai aiba aiea aiee aiff aiga aiia aiib aiir aira aire airi aiui arab arae araf arag arai arar arau arba arbe arbi area aree aref areg arei areu arfa arfb arff arfu arga argb arge argi aria arib arie arif arig arii arr- arra arre arrg arri arrr arru arua arub arue arug arui auaa aube auer aufe aufi auga auge augi aur- aura aure auri auug ba-i baaa baaf baar baba babb babe babi babr babu baer baff baga bage bagg bagi baia baib baie baig bair bar- bara barb bare barf barg bari barr baru bau- bauf baug baur bbau bbbb bbeb bbga bbrg beaf beag bear beau beba bebb bebe bebi beeb beef beeg beer befa befe beff bega begg begi begu beia beir bera bere berg beri berr beru beur bfgf bgia biaf biar biba bibb bibe bibi bieb bief bier bieu bifa biff bifi biga bigb bige bigg bigu bira birb bire birg biri birr biru brab brae braf brag brai brau brea breb bree bref breg brei brer brfu bria brie brig brrr brue brug buar buba bubb bube bubi bubu buea buer bueu bufe buff bufr buga buge bugg bugi buie buif buir buiu bur- bura burb bure burg buri burr buru eaaf eaba eafb eaga eage eaif eaiu eara earb eare ebba ebbr eber ebru ebur eeea eeee eefa eefe eega eera eerg ef-g efab efbr effa effi efua egaa egae egar egba egbe egbu egea egee eger egfr eggb egge eggi egir egra egre egri eiei eier eige eigg eira eire eraf erau erba erbb erbe ereb erei erer erg- erga ergg ergi eria erie eriu erra erre erua erub erur euba eubi euer eufi euge eur- eura eure faaa faba fabe fabi fabu faeb fafa fafe faff fafg fafi fage fagg fagi fagu faie fair fara farb fare farg farr faru faue faur fbar feaf fear feba feeb feer fefe feff fefi fege fegg feia feie feig feir fera ferb fere ferr feru ffar ffee ffff ffii ffrr fiaa fiaf fiar fiba fibe fief fier fifa fife fiff fifi figa figg fiii fira fire fiua frab frae frag frau frea free frei fria frib frie frig frub frue frug fuar fubb fubu fuff fufu fuga fuge fugi fugu fuig fuir