-up oo- ooo oop oor oos op- opo opp opr ops opy or- oro orp orr ors oru ory os- oso osp osr oss osu ou- ouo oup our ous oyo oys p-p poo pop por pos pou poy ppo ppp ppr pps ppu pro prp prr prs pru pry ps- pso psp psr pss psu psy pup pur pus puu puy py- pyo pyr pys pyu roo rop ror ros rou roy rpo rpp rpr rps rpu rrp rrr rrs rru rso rsp rsr rss rsu ruo rup rur rus ruu ruy ry- ryo ryr rys ryu ryy soo sop sor sos sou soy spo spp spr sps spu spy sr- sro srp srr srs sry ss- sso ssp ssr sss ssu suo sup sur sus suu suy sy- syp syr sys syu uoo uop uor uos up- upo upp upr ups upu ur- uro urp urr urs uru ury uso usp usr uss usu uur uus uuu uyo uys uyu yoo yop yor yos you yoy ypo yps ypu yro yrp yrs yru yso ysp ysr yss ysu ysy yuo yup yur yus yuu yuy yys yyu yyy