-er -ol b-p bbb bbc bbe bbh bbk bbl bbo bbp bbr bbs bcb bcc bce bch bck bcl bco bcp bcr bcs be- beb bec bee beh bek bel beo bep ber bes bhb bhc bhe bhh bhk bhl bho bhp bhr bhs bkb bkc bke bkk bkl bko bkp bkr bks blb blc ble blh blk bll blo blp blr bls bob boc boe boh bok bol boo bop bor bos bpb bpc bpe bph bpl bpo bpp bpr bps brb bre brh brk brl bro brp brr brs bsb bsc bse bsh bsk bsl bso bsp bsr bss c-- cbb cbc cbe cbh cbk cbl cbo cbp cbr cbs ccb ccc cce cch cck ccl cco ccp ccr ccs ce- ceb cec cee ceh cek cel ceo cep cer ces ch- chb chc che chh chk chl cho chp chr chs ckb ckc ckh cko cks cl- clb clc cle clh clk cll clo clp clr cls co- cob coc coe coh cok col coo cop cor cos cpb cpc cpe cph cpk cpl cpo cpp cpr cps crb crc cre crh crk crl cro crp crr crs csb csc cse csh csk csl cso csp csr css ebb ebc ebe ebh ebk ebl ebo ebp ebr ebs ec- ecb ecc ece ech eck ecl eco ecr ecs eeb eec eee eek eel eeo eep eer ees ehb ehc ehe ehh ehl eho ehp ehr ehs ekb ekc eke ekh ekl eko ekp ekr eks elb elc ele elh elk ell elo elp elr els eo- eob eoc eoe eoh eok eol eoo eop eor eos ep- epb epc epe eph epl epo epp epr eps erb erc ere erh erk erl ero erp err ers es- esb esc ese esh esk esl eso esp esr ess hbb hbc hbe hbh hbk hbl hbo hbp hbr hbs hcb hcc hce hch hck hcl hco hcp hcr hcs he- heb hec hee heh hek hel heo hep her hes hhb hhc hhe hhh hhk hhl hho hhp hhr hhs hkb hkh hkk hkl hko hkp hkr hks hlb hlc hle hlh hll hlo hlp hlr hls hob hoc hoe hoh hok hol hoo hop hor hos hpb hpc hpe hph hpk hpl hpo hpp hpr hps hr- hrb hrc hre hrh hrk hrl hro hrp hrr hrs hsb hsc hse hsh hsk hsl hsp hsr hss kbb kbc kbe kbh kbk kbl kbo kbp kbr kbs kcb kcc kce kch kck kcl kcp kcr kcs ke- keb kec kee keh kek kel keo kep ker kes khe khh khk kho khr khs kkb kkc kke kkh kkk kkl kkp kkr kks kl- klb klc klh klo klr kls kob koc koe koh kok kol koo kop kor kos kpc kpe kph kpk kpl kpo kpp kpr kps krc krk krl kro krp krr krs ksb ksc kse ksh ksk ksl kso ksp ksr kss l-p lbb lbc lbe lbh lbk lbl lbo lbp lbr lbs lcb lcc lce lch lck lcl lco lcp lcr lcs leb lec lee leh lek lel leo lep ler les lhb lhc lhh lhk lho lhp lhr lhs lkb lkh lkl lkp lkr lks llb llc lle llk lll llo llp llr lls lob loc loe loh lok lol loo lop lor los lpb lpc lpe lph lpk lpl lpo lpp lpr lps lrb lrc lrh lrk lro lrp lrr lrs lsb lsc lse lsh lsk lsl lso lsp lsr lss ob- obb obc obe obh obk obl obo obp obr obs oc- ocb occ och ock ocl oco ocp ocr ocs oeb oec oee oeh oel oeo oep oer oes ohc ohe ohh ohl oho ohp ohr ohs okb okc oke okk okl oko okp okr oks olb olc ole olk oll olo olp ols oo- oob ooc ooh ook ool ooo oop oor oos op- opb opc ope oph opk opl opo opp opr ops or- orb orc ore orh ork orl oro orp orr ors os- osb osc ose osh osk osl oso osp osr oss p-p pbb pbc pbe pbk pbl pbo pbp pbr pbs pcb pcc pce pch pck pcl pco pcp pcr pcs peb pec pee peh pek pel peo pep per pes phb phc phe phk phl pho php phr phs pkb pkc pke pkl pko pkp pkr pks plb plc ple plh plk pll plo plp plr pls pob poc poe poh pok pol poo pop por pos ppb ppc ppe pph ppk ppl ppo ppp ppr pps prb prc pre prh prk prl pro prp prr prs ps- psb psc pse psh psk psl pso psp psr pss rbb rbc rbe rbh rbk rbl rbo rbp rbr rbs rcb rcc rce rch rcl rco rcp rcr rcs re- reb rec ree reh rek rel reo rep rer res rh- rhb rhc rhe rhh rhl rho rhp rhr rhs rkb rkc rke rkk rko rkp rks rlc rle rlh rll rlo rlp rlr rls rob roc roe roh rok rol roo rop ror ros rpb rpc rpe rph rpk rpl rpo rpp rpr rps rrb rrc rrh rrk rrl rrp rrr rrs rsb rsc rse rsh rsk rsl rso rsp rsr rss sbb sbc sbe sbh sbk sbl sbo sbp sbr sbs scb scc sce sch sck scl sco scp scr scs se- seb sec see seh sek sel seo sep ser ses sh- shb shc she shh shk shl sho shp shr shs sk- skb skc ske skh skk skl sko skp skr sks slb slc sle slh slk sll slo slp slr sls sob soc soe soh sok sol soo sop sor sos spb spc spe sph spk spl spo spp spr sps sr- srb src sre srh srk srl sro srp srr srs ss- ssb ssc sse ssh ssk ssl sso ssp ssr sss