-ol b-p bbb bbe bbl bbo bbp bbs bbt be- beb bee bel beo bep bes bet blb ble bll blo blp bls blt bob boe bol boo bop bos bot bpb bpe bpl bpo bpp bps bpt bsb bse bsl bso bsp bss bst btb bte btl bto btp bts btt ebb ebe ebl ebo ebp ebs ebt eeb eee eel eeo eep ees eet elb ele ell elo elp els elt eo- eob eoe eol eoo eop eos eot ep- epb epe epl epo epp eps ept es- esb ese esl eso esp ess est etb ete etl eto etp ets ett l-p lbb lbe lbl lbo lbp lbs lbt leb lee lel leo lep les let llb lle lll llo llp lls llt lob loe lol loo lop los lot lpb lpe lpl lpo lpp lps lpt lsb lse lsl lso lsp lss lst ltb lte ltl lto ltp lts ltt ob- obb obe obl obo obp obs obt oeb oee oel oeo oep oes oet olb ole oll olo olp ols olt oo- oob ool ooo oop oos oot op- opb ope opl opo opp ops opt os- osb ose osl oso osp oss ost ot- otb ote otl oto otp ots ott p-p pbb pbe pbl pbo pbp pbs pbt peb pee pel peo pep pes pet plb ple pll plo plp pls plt pob poe pol poo pop pos pot ppb ppe ppl ppo ppp pps ppt ps- psb pse psl pso psp pss pst pt- ptb pte ptl pto ptp pts ptt sbb sbe sbl sbo sbp sbs sbt se- seb see sel seo sep ses set slb sle sll slo slp sls slt sob soe sol soo sop sos sot spb spe spl spo spp sps spt ss- ssb sse ssl sso ssp sss sst stb ste stl sto stp sts stt tbb tbe tbl tbo tbp tbs tbt te- teb tee tel teo tep tes tet tle tll tlo tlp tls tlt to- tob toe tol too top tos tot tpb tpe tpl tpo tpp tps tpt tsb tse tsl tso tsp tss tst ttb tte ttl tto ttp tts ttt