b-p bbb bbd bbe bbl bbp bbs bdb bdd bde bdl bdp bds be- beb bed bee bel bep bes blb bld ble bll blp bls bpb bpd bpe bpl bpp bps bsb bsd bse bsl bsp bss dbb dbd dbe dbl dbp dbs ddb ddd dde ddl ddp dds de- deb ded dee del dep des dl- dlb dld dle dll dlp dls dpb dpd dpe dpl dpp dps dsb dsd dse dsl dsp dss ebb ebd ebe ebl ebp ebs ed- edb edd ede edl edp eds eeb eed eee eel eep ees elb eld ele ell elp els ep- epb epd epe epl epp eps es- esb esd ese esl esp ess l-p lbb lbd lbe lbl lbp lbs ldb ldd lde ldl ldp lds leb led lee lel lep les llb lld lle lll llp lls lpb lpd lpe lpl lpp lps lsb lsd lse lsl lsp lss p-p pbb pbd pbe pbl pbp pbs pdb pdd pde pdl pdp pds peb ped pee pel pep pes plb pld ple pll plp pls ppb ppd ppe ppl ppp pps ps- psb psd pse psl psp pss sbb sbd sbe sbl sbp sbs sdb sdd sde sdl sdp sds se- seb sed see sel sep ses slb sld sle sll slp sls spb spd spe spl spp sps ss- ssb ssd sse ssl ssp sss