-er a-a a-b a-c aaa aab aac aae aaf aah aar aau ab- aba abb abc abe abf abh abr abu ac- aca acb acc ace acf ach acr acu aea aeb aec aee aef aeh aer aeu af- afa afb afc afe aff afh afr afu aha ahb ahc ahe ahf ahh ahr ahu ar- ara arb arc are arf arh arr aru au- aua aub auc aue auf auh aur b-u baa bab bac bae baf bah bar bau bba bbb bbc bbe bbf bbh bbr bbu bca bcb bcc bce bcf bch bcr bcu be- bea beb bec bee bef beh ber beu bfa bfb bfc bfe bff bfh bfr bfu bha bhb bhc bhe bhf bhh bhr bhu bra brb bre brf brh brr bru bua bub buc bue buf buh bur buu c-- caa cab cac cae caf cah car cau cba cbb cbc cbe cbf cbh cbr cbu cca ccb ccc cce ccf cch ccr ccu ce- cea ceb cec cee cef ceh cer ceu cfa cfb cfc cfe cff cfh cfr cfu ch- cha chb chc che chf chh chr chu cra crb crc cre crf crh crr cru cua cub cuc cue cuf cuh cur cuu eaa eab eac eae eaf eah ear eau eba ebb ebc ebe ebf ebh ebr ebu ec- eca ecb ecc ece ecf ech ecr ecu eea eeb eec eee eef eer ef- efa efb efc efe eff efh efr eha ehb ehc ehe ehf ehh ehr ehu era erb erc ere erf erh err eru eu- eua eub euc eue euf eur faa fab fac fae faf fah far fau fba fbb fbc fbe fbf fbh fbr fbu fca fcb fcc fce fcf fcr fcu fea feb fec fee fef feh fer feu ffa ffc ffe fff ffh ffr ffu fha fhb fhc fhe fhf fhh fhr fra frb frc fre frf frh frr fru fua fub fue fuf fur fuu haa hab hac hae haf hah har hau hba hbb hbc hbe hbf hbh hbr hbu hca hcb hcc hce hcf hch hcr he- hea heb hec hee hef heh her heu hfa hfb hfc hfe hff hfh hfr hfu hha hhb hhc hhe hhf hhh hhr hhu hr- hra hrb hrc hre hrf hrh hrr hru hua hub huc hue huf huh hur huu ra- raa rab rac rae raf rah rar rau rba rbb rbc rbe rbf rbh rbr rbu rca rcb rcc rce rcf rch rcr rcu re- rea reb rec ree ref reh rer reu rfa rfb rfc rfe rff rfh rfr rfu rh- rha rhb rhc rhe rhf rhh rhr rhu rra rrb rrc rrf rrh rrr rru rua rub ruc rue ruf ruh rur ruu ua- uaa uab uac uae uaf uah uar uau uba ubb ubc ube ubf ubh ubr ubu uca ucb ucc uce ucf uch ucr ucu uea ueb uec uee uef ueh uer ufa ufc ufe uff ufh ufr ufu uha uhb uhc uhe uhf uhh uhr uhu ur- ura urb urc ure urf urr uru uua uuc uue uur uuu

a-be a-fu a-ha aaaa aaab aaac aaae aaaf aaah aaar aaba aabb aabc aabh aaca aacb aacc aace aacf aach aacr aacu aaea aaec aafa aafb aafc aaff aaha aara aarc aare aaru abaa abab abac abae abaf abar abau abb- abba abbb abbe abbr abca abcb abcc abcf abch abcr abec abee aber abff abha abhr abra abrc abua abue abuf acaa acab acac acae acar acba acca accc acce accf acch accu ace- acea acec aceh acer acfc acfe acha ache achh achr achu acr- acra acrc acre acrr acu- acue acuf acur aeac aeaf aecb aeer aer- aera aerc afaa afar afca afcb afcc afch afcu afee afer affa affc afr- afra afrc afre afru afua afue ahab ahac ahah ahar ahau ahfa ahha ahra ahrc ahre ahrr ahua arab arac arae araf arah arar arau arba arbe arbh arc- arca arce arch area arec aree aref areh areu arfa arfb arfc arff arfu arh- arr- arra arrc arre arrh arrr arru arua arub arue auaa aube auca auce auch auer aufc aufe aur- aura aure baaa baaf baah baar baba babb babe babr babu bac- baca bacc bace bach baer bafc baff baha bahr bahu bar- bara barb barc bare barf barh barr baru bau- bauf baur bbau bbbb bbch bbeb bbfc bbrc bcaa bcar bcbc bcca bccc bcec bcer bcfc bche bcra bcru bcuc beaf beah bear beau beba bebb bebe beca bech becu beeb beef beer befa befe beff behr bera berc bere berr beru beur bfca bhar bhca bhcc bher bhff bhra bhur bhuu brab brac brae braf brah brau brca brcb brce brea breb brec bree bref brer brfc brfu brrr bruc brue bruh buar buba bubb bube bubu buca bucc buce buch bucu buea buer bueu bufc bufe buff bufr buha buhe buhr bur- bura burb bure burh burr buru caaa caab caac caaf caah caba cabe cabf cabu cac- caca cacc cace cach cacr caec caer caeu cafa cafb cafc cafe caff cafu caha cahe cara carb carc care carf carr cauc cauf cbac cbar cbbc cbca cbcc cbce cbcr cbcu cbea cbec cbee cbef cber cbfb cbfc cbha cbre cbrh ccaa ccab ccac ccaf ccar ccba ccbc ccca cccb cccc cccf cccu ccee ccfa ccfc ccff ccha cche cchr ccra ccrc ccre ccrf ccuc ceac cear ceba cebu cec- ceca cece ceeb ceec cef- cefa cefc cer- cera cerc cere cerf cfaa cfab cfac cfae cfar cfbc cfbr cfca cfcb cfcf cffb cffr cfra cfrb cfre chaa chab chac chae chaf chah char chau chca chce chch chea cheb chec chee chef cheh cher cheu chfa chfc chfr chha chra chrb chrc chrf chrr chua chub chur crab crac craf crar crau crbc crbu crca crcc crce crcr cre- crea creb crec cree creh creu crfc crub crue cuau cub- cuba cubb cube cuca cucc cuce cuer cufa cufc cuff cura curb cure