-er -ol bbb bbe bbh bbk bbl bbo bbr be- beb bee beh bek bel beo ber bhb bhe bhh bhk bhl bho bhr bkb bke bkk bkl bko bkr blb ble blh blk bll blo blr bob boe boh bok bol boo bor brb bre brh brk brl bro brr ebb ebe ebh ebk ebl ebo ebr eeb eee eek eel eeo eer ehb ehe ehh ehl eho ehr ekb eke ekh ekl eko ekr elb ele elh elk ell elo elr eo- eob eoe eoh eok eol eoo eor erb ere erh erk erl ero err hbb hbe hbh hbk hbl hbo hbr he- heb hee heh hek hel heo her hhb hhe hhh hhk hhl hho hhr hkb hkh hkk hkl hko hkr hlb hle hlh hll hlo hlr hob hoe hoh hok hol hoo hor hr- hrb hre hrh hrk hrl hro hrr kbb kbe kbh kbk kbl kbo kbr ke- keb kee keh kek kel keo ker khe khh khk kho khr kkb kke kkh kkk kkl kkr kl- klb klh klo klr kob koe koh kok kol koo kor krk krl kro krr lbb lbe lbh lbk lbl lbo lbr leb lee leh lek lel leo ler lhb lhh lhk lho lhr lkb lkh lkl lkr llb lle llk lll llo llr lob loe loh lok lol loo lor lrb lrh lrk lro lrr ob- obb obe obh obk obl obo obr oeb oee oeh oel oeo oer ohe ohh ohl oho ohr okb oke okk okl oko okr olb ole olk oll olo oo- oob ooh ook ool ooo oor or- orb ore orh ork orl oro orr rbb rbe rbh rbk rbl rbo rbr re- reb ree reh rek rel reo rer rh- rhb rhe rhh rhl rho rhr rkb rke rkk rko rle rlh rll rlo rlr rob roe roh rok rol roo ror rrb rrh rrk rrl rrr