scd sce sch sci sck scn sco scr scs sdc sdd sde sdh sdi sdk sdn sdo sdr sds sdy se- sec sed see seh sei sek sen seo ser ses sey sh- shc shd she shh shi shk shn sho shr shs shy sic sid sie sih sii sik sin sio sir sis sk- skc skd ske skh ski skk sko skr sks sky snc snd sne sni snk snn sno snr sns sny soc sod soe soh soi sok son soo sor sos soy sr- src srd sre srh sri srk srn sro srr srs sry ss- ssc ssd sse ssh ssi ssk ssn sso ssr sss sy- syc syd sye syh syi syk syn syr sys ycc ycd yce ych yci yco ycs ycy yde ydn ydo yds ydy yec yed yee yeh yei yek yen yeo yer yes yey yhc yhe yhi yhs yid yie yih yii yin yio yir yis yki ykk ykn ynd yne ynk ynn yns yny yoc yod yoe yoi yok yon yoo yor yos yoy yrc yre yrn yro yrs ysc yse ysi ysk yso ysr yss ysy yyc yye yys yyy