spr sps spu spy sr- srb src sre sri srm srn srp srr srs sry ss- ssb ssc sse ssi ssm ssn ssp ssr sss ssu sub suc sue sui sum sun sup sur sus suu suy sy- syb syc sye syi sym syn syp syr sys syu ubb ubc ube ubi ubn ubp ubr ubs ubu uby ucb ucc uce uci ucm ucn ucp ucr ucs ucu ueb uec uee uei uem uen uep uer ues uey uib uic uie uii uim uin uip uir uis uiu um- umb umc ume umi umm umn ump umr ums umu un- unb unc une uni unm unn unp unr uns unu uny up- upb upc upe upi upm upn upp upr ups upu ur- urb urc ure uri urm urn urp urr urs uru ury usb usc use usi usm usn usp usr uss usu uuc uue uum uun uur uus uuu uyc uyi uys uyu ybc ybe ybi ybm ybp ybr ybs yby ycc yce yci ycp ycs ycu ycy yeb yec yee yei yem yen yep yer yes yey yie yii yim yin yip yir yis ymc yme ymi ymm yms yne ynn ynp yns ynu yny yps ypu yrc yre yrn yrp yrs yru ysb ysc yse ysi ysm ysp ysr yss ysu ysy yue yui yum yun yup yur yus yuu yuy yyb yyc yye yys yyu yyy