-er a-a a-b aaa aab aad aae aah aak aar aau ab- aba abb abd abe abh abk abr abu ad- ada adb add ade adh adk adr adu aea aeb aed aee aeh aek aer aeu aha ahb ahd ahe ahh ahk ahr ahu aka akb akd ake akh akk akr aku ar- ara arb ard are arh ark arr aru au- aua aub aud aue auh auk aur b-u baa bab bad bae bah bak bar bau bba bbb bbd bbe bbh bbk bbr bbu bda bdb bdd bde bdh bdk bdr bdu be- bea beb bed bee beh bek ber beu bha bhb bhd bhe bhh bhk bhr bhu bka bkb bke bkk bkr bra brb brd bre brh brk brr bru bua bub bud bue buh buk bur buu daa dab dad dae dah dak dar dau dba dbb dbd dbe dbh dbk dbr dbu dda ddb ddd dde ddh ddk ddr ddu de- dea deb ded dee deh dek der deu dh- dha dhb dhd dhe dhh dhk dhr dhu dka dkb dke dkk dkr dku dra drb drd dre drk drr dru dua dub dud due duh duk dur eaa eab ead eae eah eak ear eau eba ebb ebd ebe ebh ebk ebr ebu ed- eda edb edd ede edh edk edr edu eea eeb eed eee eek eer eha ehb ehd ehe ehh ehr ehu eka ekb ekd eke ekh ekr eku era erb erd ere erh erk err eru eu- eua eub eud eue eur haa hab had hae hah hak har hau hba hbb hbd hbe hbh hbk hbr hbu hda hdb hdd hde hdh hdk hdr hdu he- hea heb hed hee heh hek her heu hha hhb hhd hhe hhh hhk hhr hhu hka hkb hkd hkh hkk hkr hku hr- hra hrb hrd hre hrh hrk hrr hru hua hub hud hue huh huk hur huu ka- kaa kab kad kae kah kak kar kau kba kbb kbd kbe kbh kbk kbr kbu kda kdb kde kdh kdk kdr kdu ke- kea keb ked kee keh kek ker kha khe khh khk khr khu kkb kke kkh kkk kkr kku kra krd krk krr kru kub kud kue kuh kuk kur kuu ra- raa rab rad rae rah rak rar rau rba rbb rbd rbe rbh rbk rbr rbu rda rdb rdd rde rdh rdr rdu re- rea reb red ree reh rek rer reu rh- rha rhb rhd rhe rhh rhr rhu rkb rke rkk rku rra rrb rrd rrh rrk rrr rru rua rub rud rue ruh ruk rur ruu ua- uaa uab uad uae uah uak uar uau uba ubb ube ubh ubk ubr ubu uda udb udd ude udk udr udu uea ueb ued uee ueh uer uha uhb uhd uhe uhh uhr uhu uka ukb uke ukk ukr uku ur- ura urb urd ure urk urr uru uua uue uur uuu