-er -ol -th bbb bbc bbe bbh bbk bbl bbo bbr bbs bbt bcb bcc bce bch bck bcl bco bcr bcs bct be- beb bec bee beh bek bel beo ber bes bet bhb bhc bhe bhh bhk bhl bho bhr bhs bht bkb bkc bke bkk bkl bko bkr bks bkt blb blc ble blh blk bll blo blr bls blt bob boc boe boh bok bol boo bor bos bot brb bre brh brk brl bro brr brs brt bsb bsc bse bsh bsk bsl bso bsr bss bst btb btc bte bth btk btl bto btr bts btt c-- cbb cbc cbe cbh cbk cbl cbo cbr cbs cbt ccb ccc cce cch cck ccl cco ccr ccs cct ce- ceb cec cee ceh cek cel ceo cer ces cet ch- chb chc che chh chk chl cho chr chs cht ckb ckc ckh cko cks ckt cl- clb clc cle clh clk cll clo clr cls clt co- cob coc coe coh cok col coo cor cos cot crb crc cre crh crk crl cro crr crs crt csb csc cse csh csk csl cso csr css cst ctb ctc cte cth ctk ctl cto ctr cts ctt ebb ebc ebe ebh ebk ebl ebo ebr ebs ebt ec- ecb ecc ece ech eck ecl eco ecr ecs ect eeb eec eee eek eel eeo eer ees eet ehb ehc ehe ehh ehl eho ehr ehs eht ekb ekc eke ekh ekl eko ekr eks ekt elb elc ele elh elk ell elo elr els elt eo- eob eoc eoe eoh eok eol eoo eor eos eot erb erc ere erh erk erl ero err ers ert es- esb esc ese esh esk esl eso esr ess est etb etc ete eth etk etl eto etr ets ett hbb hbc hbe hbh hbk hbl hbo hbr hbs hbt hcb hcc hce hch hck hcl hco hcr hcs hct he- heb hec hee heh hek hel heo her hes het hhb hhc hhe hhh hhk hhl hho hhr hhs hht hkb hkh hkk hkl hko hkr hks hkt hlb hlc hle hlh hll hlo hlr hls hlt hob hoc hoe hoh hok hol hoo hor hos hot hr- hrb hrc hre hrh hrk hrl hro hrr hrs hrt hsb hsc hse hsh hsk hsl hsr hss hst htb htc hte hth htk htl hto htr hts htt k-t kbb kbc kbe kbh kbk kbl kbo kbr kbs kcb kcc kce kch kck kcl kcr kcs kct ke- keb kec kee keh kek kel keo ker kes ket khe khh khk kho khr khs kkb kkc kke kkh kkk kkl kkr kks kkt kl- klb klc klh klo klr kls klt kob koc koe koh kok kol koo kor kos kot krc krk krl kro krr krs krt ksb ksc kse ksh ksk ksl kso ksr kss kst ktb ktc kte kth ktk ktl kto ktr kts ktt lbb lbc lbe lbh lbk lbl lbo lbr lbs lbt lcb lcc lce lch lck lcl lco lcr lcs lct leb lec lee leh lek lel leo ler les let lhb lhc lhh lhk lho lhr lhs lht lkb lkh lkl lkr lks lkt llb llc lle llk lll llo llr lls llt lob loc loe loh lok lol loo lor los lot lrb lrc lrh lrk lro lrr lrs lrt lsb lsc lse lsh lsk lsl lso lsr lss lst ltb ltc lte lth ltk ltl lto ltr lts ltt ob- obb obc obe obh obk obl obo obr obs obt oc- ocb occ och ock ocl oco ocr ocs oct oeb oec oee oeh oel oeo oer oes oet ohc ohe ohh ohl oho ohr ohs oht okb okc oke okk okl oko okr oks olb olc ole olk oll olo ols olt oo- oob ooc ooh ook ool ooo oor oos oot or- orb orc ore orh ork orl oro orr ors ort os- osb osc ose osh osk osl oso osr oss ost ot- otb otc ote oth otk otl oto otr ots ott rbb rbc rbe rbh rbk rbl rbo rbr rbs rbt rcb rcc rce rch rcl rco rcr rcs rct re- reb rec ree reh rek rel reo rer res ret rh- rhb rhc rhe rhh rhl rho rhr rhs rht rkb rkc rke rkk rko rks rkt rlc rle rlh rll rlo rlr rls rlt rob roc roe roh rok rol roo ror ros rot rrb rrc rrh rrk rrl rrr rrs rrt rsb rsc rse rsh rsk rsl rso rsr rss rst rtb rtc rte rtk rtl rto rtr rts rtt sbb sbc sbe sbh sbk sbl sbo sbr sbs sbt scb scc sce sch sck scl sco scr scs sct se- seb sec see seh sek sel seo ser ses set sh- shb shc she shh shk shl sho shr shs sht sk- skb skc ske skh skk skl sko skr sks skt slb slc sle slh slk sll slo slr sls slt sob soc soe soh sok sol soo sor sos sot sr- srb src sre srh srk srl sro srr srs srt ss- ssb ssc sse ssh ssk ssl sso ssr sss sst stb stc ste sth stk stl sto str sts stt tbb tbc tbe tbh tbk tbl tbo tbr tbs tbt tcb tcc tce tch tck tcl tco tcr tcs tct te- teb tec tee teh tek tel teo ter tes tet th- thb thc the thh thk thl tho thr ths tht tkb tkc tke tkk tkl tko tkr tks tkt tlc tle tlh tlk tll tlo tlr tls tlt to- tob toc toe toh tok tol too tor tos tot trb trc tre trh trk trl tro trr trs trt tsb tsc tse tsh tsk tsl tso tsr tss tst ttb ttc tte tth ttk ttl tto ttr tts ttt