-er a-a a-b a-c aaa aab aac aad aae aah aak aar aau ab- aba abb abc abd abe abh abk abr abu ac- aca acb acc acd ace ach ack acr acu ad- ada adb adc add ade adh adk adr adu aea aeb aec aed aee aeh aek aer aeu aha ahb ahc ahd ahe ahh ahk ahr ahu aka akb akc akd ake akh akk akr aku ar- ara arb arc ard are arh ark arr aru au- aua aub auc aud aue auh auk aur b-u baa bab bac bad bae bah bak bar bau bba bbb bbc bbd bbe bbh bbk bbr bbu bca bcb bcc bcd bce bch bck bcr bcu bda bdb bdc bdd bde bdh bdk bdr bdu be- bea beb bec bed bee beh bek ber beu bha bhb bhc bhd bhe bhh bhk bhr bhu bka bkb bkc bke bkk bkr bra brb brd bre brh brk brr bru bua bub buc bud bue buh buk bur buu c-- caa cab cac cad cae cah cak car cau cba cbb cbc cbd cbe cbh cbk cbr cbu cca ccb ccc ccd cce cch cck ccr ccu cda cdb cdc cdd cde cdh cdk cdr cdu ce- cea ceb cec ced cee ceh cek cer ceu ch- cha chb chc chd che chh chk chr chu cka ckb ckc ckd ckh cra crb crc crd cre crh crk crr cru cua cub cuc cud cue cuh cuk cur cuu daa dab dac dad dae dah dak dar dau dba dbb dbc dbd dbe dbh dbk dbr dbu dca dcb dcc dcd dce dck dcr dcu dda ddb ddc ddd dde ddh ddk ddr ddu de- dea deb dec ded dee deh dek der deu dh- dha dhb dhc dhd dhe dhh dhk dhr dhu dka dkb dkc dke dkk dkr dku dra drb drc drd dre drk drr dru dua dub duc dud due duh duk dur eaa eab eac ead eae eah eak ear eau eba ebb ebc ebd ebe ebh ebk ebr ebu ec- eca ecb ecc ecd ece ech eck ecr ecu ed- eda edb edc edd ede edh edk edr edu eea eeb eec eed eee eek eer eha ehb ehc ehd ehe ehh ehr ehu eka ekb ekc ekd eke ekh ekr eku era erb erc erd ere erh erk err eru eu- eua eub euc eud eue eur haa hab hac had hae hah hak har hau hba hbb hbc hbd hbe hbh hbk hbr hbu hca hcb hcc hcd hce hch hck hcr hda hdb hdc hdd hde hdh hdk hdr hdu he- hea heb hec hed hee heh hek her heu hha hhb hhc hhd hhe hhh hhk hhr hhu hka hkb hkd hkh hkk hkr hku hr- hra hrb hrc hrd hre hrh hrk hrr hru hua hub huc hud hue huh huk hur huu ka- kaa kab kac kad kae kah kak kar kau kba kbb kbc kbd kbe kbh kbk kbr kbu kca kcb kcc kcd kce kch kck kcr kcu kda kdb kdc kde kdh kdk kdr kdu ke- kea keb kec ked kee keh kek ker kha khe khh khk khr khu kkb kkc kke kkh kkk kkr kku kra krc krd krk krr kru kub kuc kud kue kuh kuk kur kuu ra- raa rab rac rad rae rah rak rar rau rba rbb rbc rbd rbe rbh rbk rbr rbu rca rcb rcc rcd rce rch rcr rcu rda rdb rdc rdd rde rdh rdr rdu re- rea reb rec red ree reh rek rer reu rh- rha rhb rhc rhd rhe rhh rhr rhu rkb rkc rke rkk rku rra rrb rrc rrd rrh rrk rrr rru rua rub ruc rud rue ruh ruk rur ruu ua- uaa uab uac uad uae uah uak uar uau uba ubb ubc ube ubh ubk ubr ubu uca ucb ucc ucd uce uch uck ucr ucu uda udb udc udd ude udk udr udu uea ueb uec ued uee ueh uer uha uhb uhc uhd uhe uhh uhr uhu uka ukb ukc uke ukk ukr uku ur- ura urb urc urd ure urk urr uru uua uuc uue uur uuu

a-ak a-be a-ha aaaa aaab aaac aaad aaae aaah aaar aaba aabb aabc aabd aabh aaca aacb aacc aacd aace aach aack aacr aacu aada aadc aade aadu aaea aaec aaha aahk aaka aake aaku aara aarc aard aare aaru abaa abab abac abad abae abak abar abau abb- abba abbb abbe abbr abca abcb abcc abcd abch abcr abda abdu abec abed abee aber abha abhr abra abrc abua abud abue abuk acaa acab acac acad acae acar acba acca accc accd acce acch accu acda acdb acdc acde ace- acea acec aced aceh acek acer acha ache achh achr achu ackd acke acr- acra acrc acre acrr acu- acue acur adaa adab adac adad adae adah adak adar adba adbc adcc adda addc addd adde addr addu adea adeb adee adeh ader adha adhd adhu adra adre adua adub adue aduk adur aeac aecb aede aeer aeka aer- aera aerc aerd ahab ahac ahad ahah ahar ahau ahed ahha ahra ahrc ahre ahrr ahua akaa akae akah akar akca aked akee aker akeu akha akka akku akr- akra akre akua arab arac arad arae arah arak arar arau arba arbe arbh arc- arca arce arch arda ardc arde ardu area arec ared aree areh arek areu arh- arka arke arkh arr- arra arrc arre arrh arrk arrr arru arua arub arud arue auaa aube auca auce auch audc aude audh auer auke aur- aura aurd aure baaa baad baah baak baar baba babb babe babr babu bac- baca bacc bace bach back bada badb badd bade badh badr badu baed baek baer baha bahr bahu bak- baka bake bakh bakr baku bar- bara barb barc bard bare barh bark barr baru bau- baud bauk baur bbad bbau bbbb bbch bbdd bbeb bbrc bcaa bcar bcbc bcca