b-u bbb bbh bbo bbs bbu bby bhb bhh bho bhs bhu bob boh boo bos bou boy bsb bsh bso bss bsu bsy bub buh buo bus buu buy by- byh byo bys byu hbb hbh hbo hbs hbu hby hhb hhh hho hhs hhu hhy hob hoh hoo hos hou hoy hsb hsh hss hsu hsy hub huh huo hus huu huy hy- hyb hyh hyo hys hyy ob- obb obh obo obs obu oby ohh oho ohs ohu oo- oob ooh ooo oos os- osb osh oso oss osu ou- ouh ouo ous oyo oys sbb sbh sbo sbs sbu sby sh- shb shh sho shs shu shy sob soh soo sos sou soy ss- ssb ssh sso sss ssu sub suh suo sus suu suy sy- syb syh sys syu ubb ubh ubo ubs ubu uby uhb uhh uho uhs uhu uhy uob uoo uos usb ush uso uss usu uus uuu uyo uys uyu ybs yby yhs yhu yob yoo yos you yoy ysb yso yss ysu ysy yuh yuo yus yuu yuy yyb yys yyu yyy