-er a-a a-b aaa aab aae aag aah aak aao aar aau ab- aba abb abe abg abh abk abo abr abu aea aeb aee aeg aeh aek aeo aer aeu ag- aga agb age agg agh agk ago agr agu aha ahb ahe ahg ahh ahk aho ahr ahu aka akb ake akg akh akk ako akr aku aoa aob aoe aog aoh aok aoo aor aou ar- ara arb are arg arh ark aro arr aru au- aua aub aue aug auh auk auo aur b-u baa bab bae bag bah bak bao bar bau bba bbb bbe bbg bbh bbk bbo bbr bbu be- bea beb bee beg beh bek beo ber beu bga bgb bge bgg bgh bgk bgo bgr bgu bha bhb bhe bhg bhh bhk bho bhr bhu bka bkb bke bkg bkk bko bkr boa bob boe bog boh bok boo bor bou bra brb bre brg brh brk bro brr bru bua bub bue bug buh buk buo bur buu eaa eab eae eag eah eak eao ear eau eba ebb ebe ebg ebh ebk ebo ebr ebu eea eeb eee eeg eek eeo eer ega egb ege egg egh ego egr egu eha ehb ehe ehg ehh eho ehr ehu eka ekb eke ekg ekh eko ekr eku eo- eoa eob eoe eog eoh eok eoo eor eou era erb ere erg erh erk ero err eru eu- eua eub eue eug eur gaa gab gae gag gah gak gao gar gau gba gbe gbg gbh gbk gbo gbr gbu ge- gea geb gee geg geh gek geo ger geu gga ggb ggg ggh ggo ggr ggu gha ghb ghe ghg ghh gho ghr gka gkb gkh gko goa gob goe gog goh gok goo gor gou gra grb gre grg grh grk gro grr gru gu- gua gub gue gug guk guo gur guu haa hab hae hag hah hak hao har hau hba hbb hbe hbg hbh hbk hbo hbr hbu he- hea heb hee heg heh hek heo her heu hga hgb hge hgg hgh hgk hgo hgr hgu hha hhb hhe hhg hhh hhk hho hhr hhu hka hkb hkg hkh hkk hko hkr hku hoa hob hoe hog hoh hok hoo hor hou hr- hra hrb hre hrg hrh hrk hro hrr hru hua hub hue hug huh huk huo hur huu ka- kaa kab kae kag kah kak kao kar kau kba kbb kbe kbh kbk kbo kbr kbu ke- kea keb kee keg keh kek keo ker kga kgb kgh kgo kgu kha khe khh khk kho khr khu kkb kke kkh kkk kkr kku koa kob koe kog koh kok koo kor kou kra krg krk kro krr kru kub kue kug kuh kuk kur kuu oaa oab oae oag oah oak oao oar oau ob- oba obb obe obg obh obk obo obr obu oea oeb oee oeg oeh oeo oer oga oge ogg ogh ogo oha ohe ohg ohh oho ohr ohu oka okb oke okg okk oko okr oku oo- ooa oob oog ooh ook ooo oor or- ora orb ore org orh ork oro orr oru ou- oua oue ouh ouk ouo our ra- raa rab rae rag rah rak rao rar rau rba rbb rbe rbg rbh rbk rbo rbr rbu re- rea reb ree reg reh rek reo rer reu rga rgb rge rgg rgh rgk rgo rgr rh- rha rhb rhe rhg rhh rho rhr rhu rkb rke rkg rkk rko rku roa rob roe rog roh rok roo ror rou rra rrb rrg rrh rrk rrr rru rua rub rue rug ruh ruk ruo rur ruu ua- uaa uab uae uag uah uak uao uar uau uba ubb ube ubg ubh ubk ubo ubr ubu uea ueb uee ueg ueh uer uga ugb uge ugg ugh ugk ugo ugr ugu uha uhb uhe uhh uho uhr uhu uka ukb uke ukk ukr uku uoa uob uoe uog uok uoo uor ur- ura urb ure urg urk uro urr uru uua uue uug uur uuu