-ey b-p bbb bbe bbp bbs bbt bby be- beb bee bep bes bet bey bpb bpe bpp bps bpt bpy bsb bse bsp bss bst bsy btb bte btp bts btt bty by- bye byp bys byt ebb ebe ebp ebs ebt eby eeb eee eep ees eet eey ep- epb epe epp eps ept es- esb ese esp ess est esy etb ete etp ets ett ety eye eyp eys eyt p-p pbb pbe pbp pbs pbt pby peb pee pep pes pet pey ppb ppe ppp pps ppt ps- psb pse psp pss pst psy pt- ptb pte ptp pts ptt pty py- pyb pye pys pyt sbb sbe sbp sbs sbt sby se- seb see sep ses set sey spb spe spp sps spt spy ss- ssb sse ssp sss sst stb ste stp sts stt sty sy- syb sye syp sys syt tbb tbe tbp tbs tbt te- teb tee tep tes tet tey tpb tpe tpp tps tpt tsb tse tsp tss tst tsy ttb tte ttp tts ttt tty tye typ tys tyt ybe ybp ybs yby yeb yee yep yes yet yey yps ysb yse ysp yss yst ysy yte ytp yts ytt yyb yye yys yyt yyy