b-p bbb bbd bbe bbp bbs bdb bdd bde bdp bds be- beb bed bee bep bes bpb bpd bpe bpp bps bsb bsd bse bsp bss dbb dbd dbe dbp dbs ddb ddd dde ddp dds de- deb ded dee dep des dpb dpd dpe dpp dps dsb dsd dse dsp dss ebb ebd ebe ebp ebs ed- edb edd ede edp eds eeb eed eee eep ees ep- epb epd epe epp eps es- esb esd ese esp ess p-p pbb pbd pbe pbp pbs pdb pdd pde pdp pds peb ped pee pep pes ppb ppd ppe ppp pps ps- psb psd pse psp pss sbb sbd sbe sbp sbs sdb sdd sde sdp sds se- seb sed see sep ses spb spd spe spp sps ss- ssb ssd sse ssp sss