-ey a-a a-b aaa aab aae aap aay ab- aba abb abe abp aby aea aeb aee aep aey ap- apa apb ape app apy ay- aya aye ayp b-p baa bab bae bap bay bba bbb bbe bbp bby be- bea beb bee bep bey bpa bpb bpe bpp bpy by- bya bye byp eaa eab eae eap eba ebb ebe ebp eby eea eeb eee eep eey ep- epa epb epe epp eya eye eyp p-p paa pab pae pap pay pba pbb pbe pbp pby pea peb pee pep pey ppa ppb ppe ppp py- pya pyb pye yaa yab yae yap yay ybe ybp yby yea yeb yee yep yey ypa yyb yye yyy