-er b-u bbb bbe bbg bbh bbk bbn bbo bbr bbu be- beb bee beg beh bek ben beo ber beu bgb bge bgg bgh bgk bgn bgo bgr bgu bhb bhe bhg bhh bhk bho bhr bhu bkb bke bkg bkk bkn bko bkr bnb bne bng bnk bnn bno bnr bnu bob boe bog boh bok bon boo bor bou brb bre brg brh brk brn bro brr bru bub bue bug buh buk bun buo bur buu ebb ebe ebg ebh ebk ebn ebo ebr ebu eeb eee eeg eek een eeo eer egb ege egg egh egn ego egr egu ehb ehe ehg ehh ehn eho ehr ehu ekb eke ekg ekh eko ekr eku en- enb ene eng enh enk enn eno enr enu eo- eob eoe eog eoh eok eon eoo eor eou erb ere erg erh erk ern ero err eru eu- eub eue eug eun eur gbe gbg gbh gbk gbn gbo gbr gbu ge- geb gee geg geh gek gen geo ger geu ggb ggg ggh ggn ggo ggr ggu ghb ghe ghg ghh ghn gho ghr gkb gkh gkn gko gnb gne gnn gno gnr gnu gob goe gog goh gok gon goo gor gou grb gre grg grh grk grn gro grr gru gu- gub gue gug guk gun guo gur guu hbb hbe hbg hbh hbk hbn hbo hbr hbu he- heb hee heg heh hek hen heo her heu hgb hge hgg hgh hgk hgn hgo hgr hgu hhb hhe hhg hhh hhk hhn hho hhr hhu hkb hkg hkh hkk hkn hko hkr hku hnb hne hng hnh hnk hnn hno hnu hob hoe hog hoh hok hon hoo hor hou hr- hrb hre hrg hrh hrk hrn hro hrr hru hub hue hug huh huk hun huo hur huu kbb kbe kbh kbk kbn kbo kbr kbu ke- keb kee keg keh kek ken keo ker kgb kgh kgo kgu khe khh khk khn kho khr khu kkb kke kkh kkk kkn kkr kku kn- kne kng knk knn kno knr knu kob koe kog koh kok kon koo kor kou krg krk krn kro krr kru kub kue kug kuh kuk kun kur kuu nbb nbe nbg nbk nbn nbo nbr nbu ne- neb nee neg neh nek nen neo ner neu ngb nge ngg ngh ngk ngn ngo ngu nhb nhe nhg nhh nhk nhn nhr nhu nke nkk nkn nko nkr nku nnb nne nng nnh nnk nnn nno nnu no- nob noe nog noh nok non noo nor nou nrb nre nrg nrk nrn nro nrr nru nub nue nug nuh nuk nun nuo nur nuu ob- obb obe obg obh obk obn obo obr obu oeb oee oeg oeh oen oeo oer oge ogg ogh ogn ogo ohe ohg ohh ohn oho ohr ohu okb oke okg okk oko okr oku on- onb one ong onh onk onn ono onr onu oo- oob oog ooh ook oon ooo oor or- orb ore org orh ork orn oro orr oru ou- oue ouh ouk oun ouo our rbb rbe rbg rbh rbk rbn rbo rbr rbu re- reb ree reg reh rek ren reo rer reu rgb rge rgg rgh rgk rgn rgo rgr rh- rhb rhe rhg rhh rhn rho rhr rhu rkb rke rkg rkk rko rku rnb rng rnh rnn rno rnr rnu rob roe rog roh rok ron roo ror rou rrb rrg rrh rrk rrn rrr rru rub rue rug ruh ruk run ruo rur ruu ubb ube ubg ubh ubk ubn ubo ubr ubu ueb uee ueg ueh uen uer ugb uge ugg ugh ugk ugn ugo ugr ugu uhb uhe uhh uho uhr uhu ukb uke ukk ukn ukr uku un- unb une ung unh unk unn uno unr unu uob uoe uog uok uon uoo uor ur- urb ure urg urk urn uro urr uru uue uug uun uur uuu