-er bbb bbe bbg bbh bbk bbr be- beb bee beg beh bek ber bgb bge bgg bgh bgk bgr bhb bhe bhg bhh bhk bhr bkb bke bkg bkk bkr brb bre brg brh brk brr ebb ebe ebg ebh ebk ebr eeb eee eeg eek eer egb ege egg egh egr ehb ehe ehg ehh ehr ekb eke ekg ekh ekr erb ere erg erh erk err gbe gbg gbh gbk gbr ge- geb gee geg geh gek ger ggb ggg ggh ggr ghb ghe ghg ghh ghr gkb gkh grb gre grg grh grk grr hbb hbe hbg hbh hbk hbr he- heb hee heg heh hek her hgb hge hgg hgh hgk hgr hhb hhe hhg hhh hhk hhr hkb hkg hkh hkk hkr hr- hrb hre hrg hrh hrk hrr kbb kbe kbh kbk kbr ke- keb kee keg keh kek ker kgb kgh khe khh khk khr kkb kke kkh kkk kkr krg krk krr rbb rbe rbg rbh rbk rbr re- reb ree reg reh rek rer rgb rge rgg rgh rgk rgr rh- rhb rhe rhg rhh rhr rkb rke rkg rkk rrb rrg rrh rrk rrr