-ey a-a a-b aaa aab aae aap aas aay ab- aba abb abe abp abs aby aea aeb aee aep aes aey ap- apa apb ape app aps apy as- asa asb ase asp ass asy ay- aya aye ayp ays b-p baa bab bae bap bas bay bba bbb bbe bbp bbs bby be- bea beb bee bep bes bey bpa bpb bpe bpp bps bpy bsa bsb bse bsp bss bsy by- bya bye byp bys eaa eab eae eap eas eba ebb ebe ebp ebs eby eea eeb eee eep ees eey ep- epa epb epe epp eps es- esa esb ese esp ess esy eya eye eyp eys p-p paa pab pae pap pas pay pba pbb pbe pbp pbs pby pea peb pee pep pes pey ppa ppb ppe ppp pps ps- psa psb pse psp pss psy py- pya pyb pye pys saa sab sae sap sas say sba sbb sbe sbp sbs sby se- sea seb see sep ses sey spa spb spe spp sps spy ss- ssa ssb sse ssp sss sy- sya syb sye syp sys yaa yab yae yap yas yay ybe ybp ybs yby yea yeb yee yep yes yey ypa yps ysa ysb yse ysp yss ysy yyb yye yys yyy