-er -ol -th b-u bbb bbc bbe bbh bbk bbl bbo bbr bbs bbt bbu bcb bcc bce bch bck bcl bco bcr bcs bct bcu be- beb bec bee beh bek bel beo ber bes bet beu bhb bhc bhe bhh bhk bhl bho bhr bhs bht bhu bkb bkc bke bkk bkl bko bkr bks bkt blb blc ble blh blk bll blo blr bls blt blu bob boc boe boh bok bol boo bor bos bot bou brb bre brh brk brl bro brr brs brt bru bsb bsc bse bsh bsk bsl bso bsr bss bst bsu btb btc bte bth btk btl bto btr bts btt btu bub buc bue buh buk bul buo bur bus but buu c-- cbb cbc cbe cbh cbk cbl cbo cbr cbs cbt cbu ccb ccc cce cch cck ccl cco ccr ccs cct ccu ce- ceb cec cee ceh cek cel ceo cer ces cet ceu ch- chb chc che chh chk chl cho chr chs cht chu ckb ckc ckh cko cks ckt cl- clb clc cle clh clk cll clo clr cls clt clu co- cob coc coe coh cok col coo cor cos cot cou crb crc cre crh crk crl cro crr crs crt cru csb csc cse csh csk csl cso csr css cst csu ctb ctc cte cth ctk ctl cto ctr cts ctt ctu cub cuc cue cuh cuk cul cuo cur cus cut cuu ebb ebc ebe ebh ebk ebl ebo ebr ebs ebt ebu ec- ecb ecc ece ech eck ecl eco ecr ecs ect ecu eeb eec eee eek eel eeo eer ees eet ehb ehc ehe ehh ehl eho ehr ehs eht ehu ekb ekc eke ekh ekl eko ekr eks ekt eku elb elc ele elh elk ell elo elr els elt elu eo- eob eoc eoe eoh eok eol eoo eor eos eot eou erb erc ere erh erk erl ero err ers ert eru es- esb esc ese esh esk esl eso esr ess est esu etb etc ete eth etk etl eto etr ets ett etu eu- eub euc eue eul eur eus eut hbb hbc hbe hbh hbk hbl hbo hbr hbs hbt hbu hcb hcc hce hch hck hcl hco hcr hcs hct he- heb hec hee heh hek hel heo her hes het heu hhb hhc hhe hhh hhk hhl hho hhr hhs hht hhu hkb hkh hkk hkl hko hkr hks hkt hku hlb hlc hle hlh hll hlo hlr hls hlt hlu hob hoc hoe hoh hok hol hoo hor hos hot hou hr- hrb hrc hre hrh hrk hrl hro hrr hrs hrt hru hsb hsc hse hsh hsk hsl hsr hss hst hsu htb htc hte hth htk htl hto htr hts htt hub huc hue huh huk hul huo hur hus hut huu k-t kbb kbc kbe kbh kbk kbl kbo kbr kbs kbu kcb kcc kce kch kck kcl kcr kcs kct kcu ke- keb kec kee keh kek kel keo ker kes ket khe khh khk kho khr khs khu kkb kkc kke kkh kkk kkl kkr kks kkt kku kl- klb klc klh klo klr kls klt klu kob koc koe koh kok kol koo kor kos kot kou krc krk krl kro krr krs krt kru ksb ksc kse ksh ksk ksl kso ksr kss kst ksu ktb ktc kte kth ktk ktl kto ktr kts ktt ktu kub kuc kue kuh kuk kul kur kus kut kuu lbb lbc lbe lbh lbk lbl lbo lbr lbs lbt lbu lcb lcc lce lch lck lcl lco lcr lcs lct lcu leb lec lee leh lek lel leo ler les let leu lhb lhc lhh lhk lho lhr lhs lht lhu lkb lkh lkl lkr lks lkt llb llc lle llk lll llo llr lls llt llu lob loc loe loh lok lol loo lor los lot lou lrb lrc lrh lrk lro lrr lrs lrt lru lsb lsc lse lsh lsk lsl lso lsr lss lst lsu ltb ltc lte lth ltk ltl lto ltr lts ltt ltu lub luc lue luh luk lul luo lur lus lut luu ob- obb obc obe obh obk obl obo obr obs obt obu oc- ocb occ och ock ocl oco ocr ocs oct ocu oeb oec oee oeh oel oeo oer oes oet ohc ohe ohh ohl oho ohr ohs oht ohu okb okc oke okk okl oko okr oks oku olb olc ole olk oll olo ols olt olu oo- oob ooc ooh ook ool ooo oor oos oot or- orb orc ore orh ork orl oro orr ors ort oru os- osb osc ose osh osk osl oso osr oss ost osu ot- otb otc ote oth otk otl oto otr ots ott otu ou- ouc oue ouh ouk oul ouo our ous out rbb rbc rbe rbh rbk rbl rbo rbr rbs rbt rbu rcb rcc rce rch rcl rco rcr rcs rct rcu re- reb rec ree reh rek rel reo rer res ret reu rh- rhb rhc rhe rhh rhl rho rhr rhs rht rhu rkb rkc rke rkk rko rks rkt rku rlc rle rlh rll rlo rlr rls rlt rlu rob roc roe roh rok rol roo ror ros rot rou rrb rrc rrh rrk rrl rrr rrs rrt rru rsb rsc rse rsh rsk rsl rso rsr rss rst rsu rtb rtc rte rtk rtl rto rtr rts rtt rtu rub ruc rue ruh ruk ruo rur rus rut ruu sbb sbc sbe sbh sbk sbl sbo sbr sbs sbt sbu scb scc sce sch sck scl sco scr scs sct scu se- seb sec see seh sek sel seo ser ses set seu sh- shb shc she shh shk shl sho shr shs sht shu sk- skb skc ske skh skk skl sko skr sks skt sku slb slc sle slh slk sll slo slr sls slt slu sob soc soe soh sok sol