-er bbb bbe bbg bbh bbk bbo bbr be- beb bee beg beh bek beo ber bez bgb bge bgg bgh bgk bgo bgr bgz bhb bhe bhg bhh bhk bho bhr bkb bke bkg bkk bko bkr bob boe bog boh bok boo bor boz brb bre brg brh brk bro brr brz bze bzh bzo bzr bzz ebb ebe ebg ebh ebk ebo ebr eeb eee eeg eek eeo eer egb ege egg egh ego egr ehb ehe ehg ehh eho ehr ekb eke ekg ekh eko ekr eo- eob eoe eog eoh eok eoo eor erb ere erg erh erk ero err erz eze ezh ezo ezr ezz gbe gbg gbh gbk gbo gbr gbz ge- geb gee geg geh gek geo ger gez ggb ggg ggh ggo ggr ggz ghb ghe ghg ghh gho ghr ghz gkb gkh gko gob goe gog goh gok goo gor goz grb gre grg grh grk gro grr gzo gzr hbb hbe hbg hbh hbk hbo hbr hbz he- heb hee heg heh hek heo her hez hgb hge hgg hgh hgk hgo hgr hhb hhe hhg hhh hhk hho hhr hhz hkb hkg hkh hkk hko hkr hob hoe hog hoh hok hoo hor hr- hrb hre hrg hrh hrk hro hrr hrz hze hzo k-z kbb kbe kbh kbk kbo kbr kbz ke- keb kee keg keh kek keo ker kez kgb kgh kgo khe khh khk kho khr khz kkb kke kkh kkk kkr kob koe kog koh kok koo kor koz krg krk kro krr kzo ob- obb obe obg obh obk obo obr oeb oee oeg oeh oeo oer oge ogg ogh ogo ohe ohg ohh oho ohr okb oke okg okk oko okr oo- oob oog ooh ook ooo oor or- orb ore org orh ork oro orr orz oze ozo ozz rbb rbe rbg rbh rbk rbo rbr re- reb ree reg reh rek reo rer rez rgb rge rgg rgh rgk rgo rgr rh- rhb rhe rhg rhh rho rhr rkb rke rkg rkk rko rkz rob roe rog roh rok roo ror roz rrb rrg rrh rrk rrr rzb rze rzo z-g zbb zbr zeb zee zeh zek zeo zer zez zgb zgg zhe zho zhr zo- zob zoe zog zok zoo zor zrh zro zzr zzz