-er a-a a-b a-c aaa aab aac aad aae aak aam aar aau ab- aba abb abc abd abe abk abm abr abu ac- aca acb acc acd ace ack acm acr acu ad- ada adb adc add ade adk adm adr adu aea aeb aec aed aee aek aem aer aeu aka akb akc akd ake akk akm akr aku ama amb amc amd ame amk amm amr amu ar- ara arb arc ard are ark arm arr aru au- aua aub auc aud aue auk aum aur b-u baa bab bac bad bae bak bam bar bau bba bbb bbc bbd bbe bbk bbm bbr bbu bca bcb bcc bcd bce bck bcm bcr bcu bda bdb bdc bdd bde bdk bdm bdr bdu be- bea beb bec bed bee bek bem ber beu bka bkb bkc bke bkk bkm bkr bma bmb bmc bmd bme bmk bmm bmr bmu bra brb brd bre brk brm brr bru bua bub buc bud bue buk bum bur buu c-- caa cab cac cad cae cak cam car cau cba cbb cbc cbd cbe cbk cbm cbr cbu cca ccb ccc ccd cce cck ccm ccr ccu cda cdb cdc cdd cde cdk cdm cdr cdu ce- cea ceb cec ced cee cek cem cer ceu cka ckb ckc ckd ckm cma cmb cmc cmd cme cmk cmm cmr cmu cra crb crc crd cre crk crm crr cru cua cub cuc cud cue cuk cum cur cuu daa dab dac dad dae dak dam dar dau dba dbb dbc dbd dbe dbk dbm dbr dbu dca dcb dcc dcd dce dck dcm dcr dcu dda ddb ddc ddd dde ddk ddm ddr ddu de- dea deb dec ded dee dek dem der deu dka dkb dkc dke dkk dkm dkr dku dma dmb dmc dmd dme dmk dmm dmr dmu dra drb drc drd dre drk drm drr dru dua dub duc dud due duk dum dur eaa eab eac ead eae eak eam ear eau eba ebb ebc ebd ebe ebk ebm ebr ebu ec- eca ecb ecc ecd ece eck ecm ecr ecu ed- eda edb edc edd ede edk edm edr edu eea eeb eec eed eee eek eem eer eka ekb ekc ekd eke ekr eku em- ema emb emc emd eme emk emm emr emu era erb erc erd ere erk erm err eru eu- eua eub euc eud eue eur ka- kaa kab kac kad kae kak kam kar kau kba kbb kbc kbd kbe kbk kbm kbr kbu kca kcb kcc kcd kce kck kcm kcr kcu kda kdb kdc kde kdk kdm kdr kdu ke- kea keb kec ked kee kek kem ker kkb kkc kke kkk kkm kkr kku kma kmb kmc kmd kme kmk kmm kmu kra krc krd krk krr kru kub kuc kud kue kuk kum kur kuu m-r maa mab mac mad mae mak mam mar mau mba mbb mbc mbd mbe mbk mbm mbr mbu mc- mca mcb mcc mcd mce mck mcm mcr mcu mda mdb mdc mdd mde mdk mdm mdr mdu mea meb mec med mee mek mem mer meu mka mkb mkc mkd mke mkk mkm mkr mku mma mmb mmc mmd mme mmk mmm mmr mmu mra mrb mrc mrd mre mrk mrm mrr mru mua mub muc mud mue muk mum mur muu ra- raa rab rac rad rae rak ram rar rau rba rbb rbc rbd rbe rbk rbm rbr rbu rca rcb rcc rcd rce rcm rcr rcu rda rdb rdc rdd rde rdm rdr rdu re- rea reb rec red ree rek rem rer reu rkb rkc rke rkk rkm rku rma rmb rmc rmd rme rmm rmr rra rrb rrc rrd rrk rrm rrr rru rua rub ruc rud rue ruk rum rur ruu ua- uaa uab uac uad uae uak uam uar uau uba ubb ubc ube ubk ubr ubu uca ucb ucc ucd uce uck ucm ucr ucu uda udb udc udd ude udk udm udr udu uea ueb uec ued uee uem uer uka ukb ukc uke ukk ukr uku um- uma umb umc umd ume umm umr umu ur- ura urb urc urd ure urk urm urr uru uua uuc uue uum uur uuu

a-ak a-be aaaa aaab aaac aaad aaae aaam aaar aaba aabb aabc aabd aabm aaca aacb aacc aacd aace aack aacm aacr aacu aada aadc aade aadu aaea aaec aaem aaka aake aaku aama aamb aamc aamd aame aamr aara aarc aard aare aarm aaru abaa abab abac abad abae abak abam abar abau abb- abba abbb abbe abbr abca abcb abcc abcd abcr abda abdu abec abed abee aber abma abmb abmc abra abrc abua abud abue abuk abum acaa acab acac acad acae acar acba acca accc accd acce accm accu acda acdb acdc acde acdm ace- acea acec aced acek acem acer ackd acke acma acmc acme acmu acr- acra acrc acre acrm acrr acu- acue acum acur adaa adab adac adad adae adak adam adar adba adbc adcc adda addc addd adde addr addu adea adeb adee adem ader adma admb adme admr adra adre adua adub adue aduk adur aeac aecb aede aeer aeka aer- aera aerc aerd akaa akae akam akar akca aked akee aker akeu akka akku akr- akra akre akua amaa amac amad amae amam amar amb- amba ambe ambr ambu amca amcc amda amec amed amee amer ameu amka amm- amma amme ammu amra amrc amua amud amum amur arab arac arad arae arak aram arar arau arba arbe arc- arca arce arcm arda ardc arde ardm ardu area arec ared aree arek arem areu arka arke arma armc armd arme armm armu arr- arra arrc arre arrk arrr arru arua arub arud arue arum auaa aube auca auce audc aude auer auke auma aur- aura aurd aure baaa baad baak baam baar baba babb babe babm babr babu bac- baca bacc bace back bada badb badd bade