snb snc snd sni snn sno snr sns snu sny soa sob soc sod soi son soo sor sos sou soy sr- sra srb src srd sri srn sro srr srs sry ss- ssa ssb ssc ssd ssi ssn sso ssr sss ssu sua sub suc sud sui sun suo sur sus suu suy sy- sya syb syc syd syi syn syr sys syu ua- uaa uab uac uad uai uan uao uar uas uau uay uba ubb ubc ubi ubn ubo ubr ubs ubu uby uca ucb ucc ucd uci ucn uco ucr ucs ucu uda udb udc udd udi udn udo udr uds udu uia uib uic uid uii uin uio uir uis uiu un- una unb unc und uni unn uno unr uns unu uny uoa uob uoc uod uon uoo uor uos ur- ura urb urc urd uri urn uro urr urs uru ury usa usb usc usd usi usn uso usr uss usu uua uuc uun uur uus uuu uyc uyi uyo uys uyu yaa yab yac yad yai yan yao yar yas yau yay ybc ybi ybr ybs yby yca ycc ycd yci yco ycs ycu ycy yda ydn ydo yds ydy yid yii yin yio yir yis yna ynd ynn yns ynu yny yob yoc yod yoi yon yoo yor yos you yoy yra yrc yrn yro yrs yru ysa ysb ysc ysi yso ysr yss ysu ysy yua yud yui yun yuo yur yus yuu yuy yyb yyc yys yyu yyy