-er a-a a-b a-c aaa aab aac aae aaf aam aar aau ab- aba abb abc abe abf abm abr abu ac- aca acb acc ace acf acm acr acu aea aeb aec aee aef aem aer aeu af- afa afb afc afe aff afm afr afu ama amb amc ame amf amm amr amu ar- ara arb arc are arf arm arr aru au- aua aub auc aue auf aum aur b-u baa bab bac bae baf bam bar bau bba bbb bbc bbe bbf bbm bbr bbu bca bcb bcc bce bcf bcm bcr bcu be- bea beb bec bee bef bem ber beu bfa bfb bfc bfe bff bfm bfr bfu bma bmb bmc bme bmf bmm bmr bmu bra brb bre brf brm brr bru bua bub buc bue buf bum bur buu c-- caa cab cac cae caf cam car cau cba cbb cbc cbe cbf cbm cbr cbu cca ccb ccc cce ccf ccm ccr ccu ce- cea ceb cec cee cef cem cer ceu cfa cfb cfc cfe cff cfm cfr cfu cma cmb cmc cme cmf cmm cmr cmu cra crb crc cre crf crm crr cru cua cub cuc cue cuf cum cur cuu eaa eab eac eae eaf eam ear eau eba ebb ebc ebe ebf ebm ebr ebu ec- eca ecb ecc ece ecf ecm ecr ecu eea eeb eec eee eef eem eer ef- efa efb efc efe eff efm efr em- ema emb emc eme emf emm emr emu era erb erc ere erf erm err eru eu- eua eub euc eue euf eur faa fab fac fae faf fam far fau fba fbb fbc fbe fbf fbm fbr fbu fca fcb fcc fce fcf fcm fcr fcu fea feb fec fee fef fem fer feu ffa ffc ffe fff ffm ffr ffu fma fmb fmc fme fmf fmm fmr fmu fra frb frc fre frf frm frr fru fua fub fue fuf fum fur fuu m-f m-r maa mab mac mae maf mam mar mau mba mbb mbc mbe mbf mbm mbr mbu mc- mca mcb mcc mce mcf mcm mcr mcu mea meb mec mee mef mem mer meu mfa mfb mfc mfe mff mfm mfr mfu mma mmb mmc mme mmf mmm mmr mmu mra mrb mrc mre mrf mrm mrr mru mua mub muc mue muf mum mur muu ra- raa rab rac rae raf ram rar rau rba rbb rbc rbe rbf rbm rbr rbu rca rcb rcc rce rcf rcm rcr rcu re- rea reb rec ree ref rem rer reu rfa rfb rfc rfe rff rfm rfr rfu rma rmb rmc rme rmf rmm rmr rra rrb rrc rrf rrm rrr rru rua rub ruc rue ruf rum rur ruu ua- uaa uab uac uae uaf uam uar uau uba ubb ubc ube ubf ubr ubu uca ucb ucc uce ucf ucm ucr ucu uea ueb uec uee uef uem uer ufa ufc ufe uff ufm ufr ufu um- uma umb umc ume umf umm umr umu ur- ura urb urc ure urf urm urr uru uua uuc uue uum uur uuu

a-be a-fu aaaa aaab aaac aaae aaaf aaam aaar aaba aabb aabc aabm aaca aacb aacc aace aacf aacm aacr aacu aaea aaec aaem aafa aafb aafc aaff aama aamb aamc aame aamr aara aarc aare aarm aaru abaa abab abac abae abaf abam abar abau abb- abba abbb abbe abbr abca abcb abcc abcf abcr abec abee aber abff abma abmb abmc abra abrc abua abue abuf abum acaa acab acac acae acar acba acca accc acce accf accm accu ace- acea acec acem acer acfc acfe acfm acma acmc acme acmf acmu acr- acra acrc acre acrm acrr acu- acue acuf acum acur aeac aeaf aecb aeer aer- aera aerc afaa afam afar afca afcb afcc afcu afee afer affa affc afma afmc afr- afra afrc afre afrm afru afua afue amaa amac amae amam amar amb- amba ambe ambr ambu amca amcc amec amee amer ameu amfm amfr amm- amma amme ammu amra amrc amua amum amur arab arac arae araf aram arar arau arba arbe arc- arca arce arcm area arec aree aref arem areu arfa arfb arfc arff arfu arma armc arme armm armu arr- arra arrc arre arrr arru arua arub arue arum auaa aube auca auce auer aufc aufe auma aur- aura aure baaa baaf baam baar baba babb babe babm babr babu bac- baca bacc bace baer bafc baff bama bamb bamc bame bamf bamm bamu bar- bara barb barc bare barf barm barr baru bau- bauf baum baur bbau bbbb bbcm bbeb bbfc bbrc bcaa bcam bcar bcbc bcca bccc bccm bcec bcer bcfc bcfm bcma bcra bcru bcuc beaf beam bear beau beba bebb bebe beca becu beeb beef beem beer befa befe beff bema beme bemu bera berc bere berm berr beru beur bfca bfme bmaa bmce bmfc brab brac brae braf bram brau brca brcb brce brea breb brec bree bref brem brer brfc brfm brfu brmc brrm brrr bruc brue brum buar buba bubb bube bubu buca bucc buce bucu buea buem buer bueu bufc bufe buff bufr bum- buma bumb bumf bur- bura burb bure burm burr buru caaa caab caac caaf caam caba cabe cabf cabu cac- caca cacc cace cacm cacr caec caem caer caeu cafa cafb cafc cafe caff cafu cama camb camc came camm cara carb carc care carf carm carr cauc cauf caum cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbcu cbea cbec cbee cbef cber cbfb cbfc cbme cbre cbrm ccaa ccab ccac ccaf ccam ccar ccba ccbc ccca cccb cccc cccf cccm cccu ccee ccfa ccfc ccff ccma ccmb ccmc ccmm ccra ccrc ccre ccrf ccuc ceac cear ceba cebu cec- ceca cece cecm ceeb ceec ceem cef- cefa cefc cema cemb ceme cemm cemr cemu cer- cera cerc cere cerf cfaa cfab cfac cfae cfam cfar cfbc cfbr cfca cfcb cfcf cfcm cffb cffr cfma