-er b-u bbb bbe bbg bbh bbk bbr bbu be- beb bee beg beh bek ber beu bgb bge bgg bgh bgk bgr bgu bhb bhe bhg bhh bhk bhr bhu bkb bke bkg bkk bkr brb bre brg brh brk brr bru bub bue bug buh buk bur buu ebb ebe ebg ebh ebk ebr ebu eeb eee eeg eek eer egb ege egg egh egr egu ehb ehe ehg ehh ehr ehu ekb eke ekg ekh ekr eku erb ere erg erh erk err eru eu- eub eue eug eur gbe gbg gbh gbk gbr gbu ge- geb gee geg geh gek ger geu ggb ggg ggh ggr ggu ghb ghe ghg ghh ghr gkb gkh grb gre grg grh grk grr gru gu- gub gue gug guk gur guu hbb hbe hbg hbh hbk hbr hbu he- heb hee heg heh hek her heu hgb hge hgg hgh hgk hgr hgu hhb hhe hhg hhh hhk hhr hhu hkb hkg hkh hkk hkr hku hr- hrb hre hrg hrh hrk hrr hru hub hue hug huh huk hur huu kbb kbe kbh kbk kbr kbu ke- keb kee keg keh kek ker kgb kgh kgu khe khh khk khr khu kkb kke kkh kkk kkr kku krg krk krr kru kub kue kug kuh kuk kur kuu rbb rbe rbg rbh rbk rbr rbu re- reb ree reg reh rek rer reu rgb rge rgg rgh rgk rgr rh- rhb rhe rhg rhh rhr rhu rkb rke rkg rkk rku rrb rrg rrh rrk rrr rru rub rue rug ruh ruk rur ruu ubb ube ubg ubh ubk ubr ubu ueb uee ueg ueh uer ugb uge ugg ugh ugk ugr ugu uhb uhe uhh uhr uhu ukb uke ukk ukr uku ur- urb ure urg urk urr uru uue uug uur uuu