sk- ska skc skd ske skk skm sko skr sks skt sku sma smc smd sme smk smm smo smr sms smt smu soa soc sod soe sok som soo sor sos sot sou sr- sra src srd sre srk srm sro srr srs srt ss- ssa ssc ssd sse ssk ssm sso ssr sss sst ssu sta stc std ste stk stm sto str sts stt stu sua suc sud sue suk sum suo sur sus sut suu taa tac tad tae tak tam tao tar tas tat tau tca tcc tcd tce tck tcm tco tcr tcs tct tcu tda tdc tdd tde tdk tdm tdo tdr tds tdt tdu te- tea tec ted tee tek tem teo ter tes tet teu tka tkc tke tkk tkm tko tkr tks tkt tma tmc tmd tme tmk tmm tmo tmr tms tmt tmu to- toa toc tod toe tok tom too tor tos tot tou tra trc trd tre trk trm tro trr trs trt tru tsa tsc tsd tse tsk tsm tso tsr tss tst tsu tta ttc ttd tte ttk ttm tto ttr tts ttt ttu tua tuc tud tue tuk tum tuo tur tus tut tuu ua- uaa uac uad uae uak uam uao uar uas uat uau uca ucc ucd uce uck ucm uco ucr ucs uct ucu uda udc udd ude udk udm udo udr uds udt udu uea uec ued uee uem uer ues uet uka ukc uke ukk ukr uku um- uma umc umd ume umm umo umr ums umt umu uoa uoc uod uoe uok uom uoo uor uos uot ur- ura urc urd ure urk urm uro urr urs urt uru usa usc usd use usk usm uso usr uss ust usu uta utc utd ute utk utm uto utr uts utt utu uua uuc uue uum uur uus uut uuu