-er -ol bbb bbc bbe bbg bbh bbk bbl bbo bbr bcb bcc bce bcg bch bck bcl bco bcr be- beb bec bee beg beh bek bel beo ber bgb bgc bge bgg bgh bgk bgl bgo bgr bhb bhc bhe bhg bhh bhk bhl bho bhr bkb bkc bke bkg bkk bkl bko bkr blb blc ble blg blh blk bll blo blr bob boc boe bog boh bok bol boo bor brb bre brg brh brk brl bro brr c-- cbb cbc cbe cbg cbh cbk cbl cbo cbr ccb ccc cce ccg cch cck ccl cco ccr ce- ceb cec cee ceg ceh cek cel ceo cer cgb cgc cge cgg cgh cgl cgo cgr ch- chb chc che chg chh chk chl cho chr ckb ckc ckh cko cl- clb clc cle clg clh clk cll clo clr co- cob coc coe cog coh cok col coo cor crb crc cre crg crh crk crl cro crr ebb ebc ebe ebg ebh ebk ebl ebo ebr ec- ecb ecc ece ecg ech eck ecl eco ecr eeb eec eee eeg eek eel eeo eer egb egc ege egg egh egl ego egr ehb ehc ehe ehg ehh ehl eho ehr ekb ekc eke ekg ekh ekl eko ekr elb elc ele elg elh elk ell elo elr eo- eob eoc eoe eog eoh eok eol eoo eor erb erc ere erg erh erk erl ero err gbc gbe gbg gbh gbk gbl gbo gbr gcb gcc gce gcg gch gck gcl gco gcr ge- geb gec gee geg geh gek gel geo ger ggb ggc ggg ggh ggo ggr ghb ghc ghe ghg ghh ghl gho ghr gkb gkh gko glb glc gle glg glh glk gll glo glr gob goc goe gog goh gok gol goo gor grb grc gre grg grh grk grl gro grr hbb hbc hbe hbg hbh hbk hbl hbo hbr hcb hcc hce hcg hch hck hcl hco hcr he- heb hec hee heg heh hek hel heo her hgb hgc hge hgg hgh hgk hgl hgo hgr hhb hhc hhe hhg hhh hhk hhl hho hhr hkb hkg hkh hkk hkl hko hkr hlb hlc hle hlg hlh hll hlo hlr hob hoc hoe hog hoh hok hol hoo hor hr- hrb hrc hre hrg hrh hrk hrl hro hrr kbb kbc kbe kbh kbk kbl kbo kbr kcb kcc kce kcg kch kck kcl kcr ke- keb kec kee keg keh kek kel keo ker kgb kgc kgh kgl kgo khe khh khk kho khr kkb kkc kke kkh kkk kkl kkr kl- klb klc klg klh klo klr kob koc koe kog koh kok kol koo kor krc krg krk krl kro krr lbb lbc lbe lbg lbh lbk lbl lbo lbr lcb lcc lce lcg lch lck lcl lco lcr leb lec lee leg leh lek lel leo ler lgb lgc lge lgg lgh lgk lgl lgo lgr lhb lhc lhh lhk lho lhr lkb lkg lkh lkl lkr llb llc lle llg llk lll llo llr lob loc loe log loh lok lol loo lor lrb lrc lrg lrh lrk lro lrr ob- obb obc obe obg obh obk obl obo obr oc- ocb occ ocg och ock ocl oco ocr oeb oec oee oeg oeh oel oeo oer ogc oge ogg ogh ogl ogo ohc ohe ohg ohh ohl oho ohr okb okc oke okg okk okl oko okr olb olc ole olg olk oll olo oo- oob ooc oog ooh ook ool ooo oor or- orb orc ore org orh ork orl oro orr rbb rbc rbe rbg rbh rbk rbl rbo rbr rcb rcc rce rcg rch rcl rco rcr re- reb rec ree reg reh rek rel reo rer rgb rgc rge rgg rgh rgk rgo rgr rh- rhb rhc rhe rhg rhh rhl rho rhr rkb rkc rke rkg rkk rko rlc rle rlg rlh rll rlo rlr rob roc roe rog roh rok rol roo ror rrb rrc rrg rrh rrk rrl rrr