sku sna snc sng sni snk snn snp snr sns snt snu spa spc spg spi spk spn spp spr sps spt spu sr- sra src srg sri srk srn srp srr srs srt ss- ssa ssc ssg ssi ssk ssn ssp ssr sss sst ssu sta stc stg sti stk stn stp str sts stt stu sua suc sug sui suk sun sup sur sus sut suu taa tac tag tai tak tan tap tar tas tat tau tca tcc tcg tci tck tcn tcp tcr tcs tct tcu tga tgc tgg tgi tgk tgn tgp tgr tgs tgt tgu tia tic tig tii tik tin tip tir tis tit tiu tka tkc tkg tkk tkp tkr tks tkt tna tnc tng tni tnk tnn tnp tnr tns tnt tpa tpc tpg tpi tpk tpn tpp tpr tps tpt tpu tra trc trg tri trk trn trp trr trs trt tru tsa tsc tsg tsi tsk tsn tsp tsr tss tst tsu tta ttc ttg tti ttk ttn ttp ttr tts ttt ttu tua tuc tug tui tuk tun tup tur tus tut tuu ua- uaa uac uag uai uak uan uap uar uas uat uau uca ucc ucg uci uck ucn ucp ucr ucs uct ucu uga ugc ugg ugi ugk ugn ugp ugr ugs ugt ugu uia uic uig uii uin uip uir uis uit uiu uka ukc uki ukk ukn ukp ukr uku un- una unc ung uni unk unn unp unr uns unt unu up- upa upc upg upi upk upn upp upr ups upt upu ur- ura urc urg uri urk urn urp urr urs urt uru usa usc usg usi usk usn usp usr uss ust usu uta utc uti utk utn utp utr uts utt utu uua uuc uug uun uur uus uut uuu