b-p bbb bbg bbk bbp bbs bby bgb bgg bgk bgp bgs bkb bkg bkk bkp bks bpb bpg bpp bps bpy bsb bsg bsk bsp bss bsy by- byg byk byp bys g-p gbg gbk gbp gbs gby ggb ggg ggp ggs gkb gkp gks gpb gpg gpk gpp gps gsb gsg gsk gsp gss gy- gyb gyp gys kbb kbk kbp kbs kgb kgp kgs kgy kkb kkk kkp kks kky kpk kpp kps ksb ksg ksk ksp kss kyp kys p-p pbb pbg pbk pbp pbs pby pgb pgg pgk pgp pgs pgy pkb pkg pkp pks pky ppb ppg ppk ppp pps ps- psb psg psk psp pss psy py- pyb pyg pyk pys sbb sbg sbk sbp sbs sby sgb sgg sgk sgp sgs sk- skb skg skk skp sks sky spb spg spk spp sps spy ss- ssb ssg ssk ssp sss sy- syb syg syk syp sys ybg ybp ybs yby ykk ypg yps ysb ysg ysk ysp yss ysy yyb yyg yys yyy