b-p bbb bbe bbl bbp bbs bbt be- beb bee bel bep bes bet blb ble bll blp bls blt bpb bpe bpl bpp bps bpt bsb bse bsl bsp bss bst btb bte btl btp bts btt ebb ebe ebl ebp ebs ebt eeb eee eel eep ees eet elb ele ell elp els elt ep- epb epe epl epp eps ept es- esb ese esl esp ess est etb ete etl etp ets ett l-p lbb lbe lbl lbp lbs lbt leb lee lel lep les let llb lle lll llp lls llt lpb lpe lpl lpp lps lpt lsb lse lsl lsp lss lst ltb lte ltl ltp lts ltt p-p pbb pbe pbl pbp pbs pbt peb pee pel pep pes pet plb ple pll plp pls plt ppb ppe ppl ppp pps ppt ps- psb pse psl psp pss pst pt- ptb pte ptl ptp pts ptt sbb sbe sbl sbp sbs sbt se- seb see sel sep ses set slb sle sll slp sls slt spb spe spl spp sps spt ss- ssb sse ssl ssp sss sst stb ste stl stp sts stt tbb tbe tbl tbp tbs tbt te- teb tee tel tep tes tet tle tll tlp tls tlt tpb tpe tpl tpp tps tpt tsb tse tsl tsp tss tst ttb tte ttl ttp tts ttt