-er -ol bbb bbe bbi bbk bbl bbo bbr bbt be- beb bee bei bek bel beo ber bet bez bi- bib bie bii bik bil bio bir bit biz bkb bke bkk bkl bko bkr bkt blb ble bli blk bll blo blr blt blz bob boe boi bok bol boo bor bot boz brb bre bri brk brl bro brr brt brz btb bte bti btk btl bto btr btt btz bze bzo bzr bzz ebb ebe ebi ebk ebl ebo ebr ebt eeb eee eek eel eeo eer eet eib eie eii eik eil eio eir eit ekb eke eki ekl eko ekr ekt elb ele eli elk ell elo elr elt elz eo- eob eoe eoi eok eol eoo eor eot erb ere eri erk erl ero err ert erz etb ete eti etk etl eto etr ett etz eze ezo ezr ezz ibb ibe ibi ibk ibl ibo ibr ibt ibz ie- iee iei iek iel ier iet iib iie iii iil iio iir iit ikb ike iki ikk ikl iko ikr ikt il- ilb ile ili ilk ill ilo ilr ilt ilz io- iob ioe ioi iol ioo ior iot ir- irb ire iri irk irl iro irr irt itb ite iti itk itl ito itt itz ize izi izo izz k-t k-z kbb kbe kbi kbk kbl kbo kbr kbz ke- keb kee kei kek kel keo ker ket kez kib kie kii kik kil kio kir kit kiz kkb kke kki kkk kkl kkr kkt kl- klb kli klo klr klt klz kob koe koi kok kol koo kor kot koz kri krk krl kro krr krt ktb kte ktk ktl kto ktr ktt kzo lbb lbe lbi lbk lbl lbo lbr lbt leb lee lei lek lel leo ler let lez lib lie lii lik lil lio lir lit liz lkb lkl lkr lkt llb lle lli llk lll llo llr llt llz lob loe loi lok lol loo lor lot loz lrb lri lrk lro lrr lrt lrz ltb lte lti ltk ltl lto ltr ltt ltz lzi lzo lzr o-i ob- obb obe obi obk obl obo obr obt oeb oee oei oel oeo oer oet oib oie oii oik oil oio oir oit oiz okb oke oki okk okl oko okr olb ole oli olk oll olo olt oo- oob ooi ook ool ooo oor oot or- orb ore ori ork orl oro orr ort orz ot- otb ote oti otk otl oto otr ott otz oze ozo ozt ozz rbb rbe rbi rbk rbl rbo rbr rbt re- reb ree rei rek rel reo rer ret rez rib rie rii rik ril rio rir rit riz rkb rke rkk rko rkt rkz rle rli rll rlo rlr rlt rob roe roi rok rol roo ror rot roz rrb rri rrk rrl rrr rrt rtb rte rti rtk rtl rto rtr rtt rtz rzb rze rzo tbb tbe tbi tbk tbl tbo tbr tbt tbz te- teb tee tei tek tel teo ter tet tez tib tie tii tik til tio tir tit tiz tkb tke tkk tkl tko tkr tkt tkz tle tli tlk tll tlo tlr tlt tlz to- tob toe toi tok tol too tor tot toz trb tre tri trk trl tro trr trt trz ttb tte tti ttk ttl tto ttr ttt tze zbb zbl zbr zbt zeb zee zek zel zeo zer zet zez zib zie zik zil zio zir zit ziz zlr zlt zo- zob zoe zoi zok zol zoo zor zot zrl zro zte ztl ztr zzr zzt zzz