-ey a-a a-b a-t aaa aab aae aap aas aat aay ab- aba abb abe abp abs abt aby aea aeb aee aep aes aet aey ap- apa apb ape app aps apt apy as- asa asb ase asp ass ast asy at- ata atb ate atp ats att ay- aya aye ayp ays ayt b-p baa bab bae bap bas bat bay bba bbb bbe bbp bbs bbt bby be- bea beb bee bep bes bet bey bpa bpb bpe bpp bps bpt bpy bsa bsb bse bsp bss bst bsy bta btb bte btp bts btt bty by- bya bye byp bys byt eaa eab eae eap eas eat eba ebb ebe ebp ebs ebt eby eea eeb eee eep ees eet eey ep- epa epb epe epp eps ept es- esa esb ese esp ess est esy eta etb ete etp ets ett ety eya eye eyp eys eyt p-p paa pab pae pap pas pat pay pba pbb pbe pbp pbs pbt pby pea peb pee pep pes pet pey ppa ppb ppe ppp pps ppt ps- psa psb pse psp pss pst psy pt- pta ptb pte ptp pts ptt pty py- pya pyb pye pys pyt saa sab sae sap sas sat say sba sbb sbe sbp sbs sbt sby se- sea seb see sep ses set sey spa spb spe spp sps spt spy ss- ssa ssb sse ssp sss sst sta stb ste stp sts stt sty sy- sya syb sye syp sys syt taa tab tae tap tas tat tay tba tbb tbe tbp tbs tbt te- tea teb tee tep tes tet tey tpa tpb tpe tpp tps tpt tsa tsb tse tsp tss tst tsy tta ttb tte ttp tts ttt tty tya tye typ tys tyt yaa yab yae yap yas yat yay ybe ybp ybs yby yea yeb yee yep yes yet yey ypa yps ysa ysb yse ysp yss yst ysy yta yte ytp yts ytt yyb yye yys yyt yyy