sso ssr sss ssu sub suc sug sui sum sun suo sur sus suu suy sy- syb syc syg syi sym syn syr sys syu ubb ubc ubg ubi ubn ubo ubr ubs ubu uby ucb ucc ucg uci ucm ucn uco ucr ucs ucu ugb ugc ugg ugi ugm ugn ugo ugr ugs ugu uib uic uig uii uim uin uio uir uis uiu um- umb umc umg umi umm umn umo umr ums umu un- unb unc ung uni unm unn uno unr uns unu uny uob uoc uog uom uon uoo uor uos ur- urb urc urg uri urm urn uro urr urs uru ury usb usc usg usi usm usn uso usr uss usu uuc uug uum uun uur uus uuu uyc uyi uyo uys uyu ybc ybg ybi ybm ybr ybs yby ycc yci yco ycs ycu ycy ygc ygm ygo yig yii yim yin yio yir yis ymc ymg ymi ymm ymo yms yng ynn yns ynu yny yob yoc yog yoi yom yon yoo yor yos you yoy yrc yrg yrn yro yrs yru ysb ysc ysg ysi ysm yso ysr yss ysu ysy yug yui yum yun yuo yur yus yuu yuy yyb yyc yyg yys yyu yyy