b-p bbb bbe bbi bbl bbp bbs bbt be- beb bee bei bel bep bes bet bi- bib bie bii bil bip bis bit blb ble bli bll blp bls blt bpb bpe bpi bpl bpp bps bpt bsb bse bsi bsl bsp bss bst btb bte bti btl btp bts btt ebb ebe ebi ebl ebp ebs ebt eeb eee eel eep ees eet eib eie eii eil eip eis eit elb ele eli ell elp els elt ep- epb epe epi epl epp eps ept es- esb ese esi esl esp ess est etb ete eti etl etp ets ett ibb ibe ibi ibl ibp ibs ibt ie- iee iei iel iep ies iet iib iie iii iil iip iis iit il- ilb ile ili ill ilp ils ilt ipb ipe ipi ipl ipp ips ipt is- isb ise isi isl isp iss ist itb ite iti itl itp its itt l-p lbb lbe lbi lbl lbp lbs lbt leb lee lei lel lep les let lib lie lii lil lip lis lit llb lle lli lll llp lls llt lpb lpe lpi lpl lpp lps lpt lsb lse lsi lsl lsp lss lst ltb lte lti ltl ltp lts ltt p-p pbb pbe pbi pbl pbp pbs pbt peb pee pei pel pep pes pet pib pie pii pil pip pis pit plb ple pli pll plp pls plt ppb ppe ppi ppl ppp pps ppt ps- psb pse psi psl psp pss pst pt- ptb pte pti ptl ptp pts ptt sbb sbe sbi sbl sbp sbs sbt se- seb see sei sel sep ses set sib sie sii sil sip sis sit slb sle sli sll slp sls slt spb spe spi spl spp sps spt ss- ssb sse ssi ssl ssp sss sst stb ste sti stl stp sts stt tbb tbe tbi tbl tbp tbs tbt te- teb tee tei tel tep tes tet tib tie tii til tip tis tit tle tli tll tlp tls tlt tpb tpe tpi tpl tpp tps tpt tsb tse tsi tsl tsp tss tst ttb tte tti ttl ttp tts ttt