-er -ol b-p bbb bbc bbe bbl bbo bbp bbr bbs bbt bcb bcc bce bcl bco bcp bcr bcs bct be- beb bec bee bel beo bep ber bes bet blb blc ble bll blo blp blr bls blt bob boc boe bol boo bop bor bos bot bpb bpc bpe bpl bpo bpp bpr bps bpt brb bre brl bro brp brr brs brt bsb bsc bse bsl bso bsp bsr bss bst btb btc bte btl bto btp btr bts btt c-- cbb cbc cbe cbl cbo cbp cbr cbs cbt ccb ccc cce ccl cco ccp ccr ccs cct ce- ceb cec cee cel ceo cep cer ces cet cl- clb clc cle cll clo clp clr cls clt co- cob coc coe col coo cop cor cos cot cpb cpc cpe cpl cpo cpp cpr cps cpt crb crc cre crl cro crp crr crs crt csb csc cse csl cso csp csr css cst ctb ctc cte ctl cto ctp ctr cts ctt ebb ebc ebe ebl ebo ebp ebr ebs ebt ec- ecb ecc ece ecl eco ecr ecs ect eeb eec eee eel eeo eep eer ees eet elb elc ele ell elo elp elr els elt eo- eob eoc eoe eol eoo eop eor eos eot ep- epb epc epe epl epo epp epr eps ept erb erc ere erl ero erp err ers ert es- esb esc ese esl eso esp esr ess est etb etc ete etl eto etp etr ets ett l-p lbb lbc lbe lbl lbo lbp lbr lbs lbt lcb lcc lce lcl lco lcp lcr lcs lct leb lec lee lel leo lep ler les let llb llc lle lll llo llp llr lls llt lob loc loe lol loo lop lor los lot lpb lpc lpe lpl lpo lpp lpr lps lpt lrb lrc lro lrp lrr lrs lrt lsb lsc lse lsl lso lsp lsr lss lst ltb ltc lte ltl lto ltp ltr lts ltt ob- obb obc obe obl obo obp obr obs obt oc- ocb occ ocl oco ocp ocr ocs oct oeb oec oee oel oeo oep oer oes oet olb olc ole oll olo olp ols olt oo- oob ooc ool ooo oop oor oos oot op- opb opc ope opl opo opp opr ops opt or- orb orc ore orl oro orp orr ors ort os- osb osc ose osl oso osp osr oss ost ot- otb otc ote otl oto otp otr ots ott p-p pbb pbc pbe pbl pbo pbp pbr pbs pbt pcb pcc pce pcl pco pcp pcr pcs pct peb pec pee pel peo pep per pes pet plb plc ple pll plo plp plr pls plt pob poc poe pol poo pop por pos pot ppb ppc ppe ppl ppo ppp ppr pps ppt prb prc pre prl pro prp prr prs prt ps- psb psc pse psl pso psp psr pss pst pt- ptb ptc pte ptl pto ptp ptr pts ptt rbb rbc rbe rbl rbo rbp rbr rbs rbt rcb rcc rce rcl rco rcp rcr rcs rct re- reb rec ree rel reo rep rer res ret rlc rle rll rlo rlp rlr rls rlt rob roc roe rol roo rop ror ros rot rpb rpc rpe rpl rpo rpp rpr rps rpt rrb rrc rrl rrp rrr rrs rrt rsb rsc rse rsl rso rsp rsr rss rst rtb rtc rte rtl rto rtp rtr rts rtt sbb sbc sbe sbl sbo sbp sbr sbs sbt scb scc sce scl sco scp scr scs sct se- seb sec see sel seo sep ser ses set slb slc sle sll slo slp slr sls slt sob soc soe sol soo sop sor sos sot spb spc spe spl spo spp spr sps spt sr- srb src sre srl sro srp srr srs srt ss- ssb ssc sse ssl sso ssp ssr sss sst stb stc ste stl sto stp str sts stt tbb tbc tbe tbl tbo tbp tbr tbs tbt tcb tcc tce tcl tco tcp tcr tcs tct te- teb tec tee tel teo tep ter tes tet tlc tle tll tlo tlp tlr tls tlt to- tob toc toe tol too top tor tos tot tpb tpc tpe tpl tpo tpp tpr tps tpt trb trc tre trl tro trp trr trs trt tsb tsc tse tsl tso tsp tsr tss tst ttb ttc tte ttl tto ttp ttr tts ttt