-er -ol -th bbb bbe bbh bbk bbl bbo bbr bbs bbt be- beb bee beh bek bel beo ber bes bet bhb bhe bhh bhk bhl bho bhr bhs bht bkb bke bkk bkl bko bkr bks bkt blb ble blh blk bll blo blr bls blt bob boe boh bok bol boo bor bos bot brb bre brh brk brl bro brr brs brt bsb bse bsh bsk bsl bso bsr bss bst btb bte bth btk btl bto btr bts btt ebb ebe ebh ebk ebl ebo ebr ebs ebt eeb eee eek eel eeo eer ees eet ehb ehe ehh ehl eho ehr ehs eht ekb eke ekh ekl eko ekr eks ekt elb ele elh elk ell elo elr els elt eo- eob eoe eoh eok eol eoo eor eos eot erb ere erh erk erl ero err ers ert es- esb ese esh esk esl eso esr ess est etb ete eth etk etl eto etr ets ett hbb hbe hbh hbk hbl hbo hbr hbs hbt he- heb hee heh hek hel heo her hes het hhb hhe hhh hhk hhl hho hhr hhs hht hkb hkh hkk hkl hko hkr hks hkt hlb hle hlh hll hlo hlr hls hlt hob hoe hoh hok hol hoo hor hos hot hr- hrb hre hrh hrk hrl hro hrr hrs hrt hsb hse hsh hsk hsl hsr hss hst htb hte hth htk htl hto htr hts htt k-t kbb kbe kbh kbk kbl kbo kbr kbs ke- keb kee keh kek kel keo ker kes ket khe khh khk kho khr khs kkb kke kkh kkk kkl kkr kks kkt kl- klb klh klo klr kls klt kob koe koh kok kol koo kor kos kot krk krl kro krr krs krt ksb kse ksh ksk ksl kso ksr kss kst ktb kte kth ktk ktl kto ktr kts ktt lbb lbe lbh lbk lbl lbo lbr lbs lbt leb lee leh lek lel leo ler les let lhb lhh lhk lho lhr lhs lht lkb lkh lkl lkr lks lkt llb lle llk lll llo llr lls llt lob loe loh lok lol loo lor los lot lrb lrh lrk lro lrr lrs lrt lsb lse lsh lsk lsl lso lsr lss lst ltb lte lth ltk ltl lto ltr lts ltt ob- obb obe obh obk obl obo obr obs obt oeb oee oeh oel oeo oer oes oet ohe ohh ohl oho ohr ohs oht okb oke okk okl oko okr oks olb ole olk oll olo ols olt oo- oob ooh ook ool ooo oor oos oot or- orb ore orh ork orl oro orr ors ort os- osb ose osh osk osl oso osr oss ost ot- otb ote oth otk otl oto otr ots ott rbb rbe rbh rbk rbl rbo rbr rbs rbt re- reb ree reh rek rel reo rer res ret rh- rhb rhe rhh rhl rho rhr rhs rht rkb rke rkk rko rks rkt rle rlh rll rlo rlr rls rlt rob roe roh rok rol roo ror ros rot rrb rrh rrk rrl rrr rrs rrt rsb rse rsh rsk rsl rso rsr rss rst rtb rte rtk rtl rto rtr rts rtt sbb sbe sbh sbk sbl sbo sbr sbs sbt se- seb see seh sek sel seo ser ses set sh- shb she shh shk shl sho shr shs sht sk- skb ske skh skk skl sko skr sks skt slb sle slh slk sll slo slr sls slt sob soe soh sok sol soo sor sos sot sr- srb sre srh srk srl sro srr srs srt ss- ssb sse ssh ssk ssl sso ssr sss sst stb ste sth stk stl sto str sts stt tbb tbe tbh tbk tbl tbo tbr tbs tbt te- teb tee teh tek tel teo ter tes tet th- thb the thh thk thl tho thr ths tht tkb tke tkk tkl tko tkr tks tkt tle tlh tlk tll tlo tlr tls tlt to- tob toe toh tok tol too tor tos tot trb tre trh trk trl tro trr trs trt tsb tse tsh tsk tsl tso tsr tss tst ttb tte tth ttk ttl tto ttr tts ttt