skd ske ski skk skm sko skp sks skt sku smc smd sme smi smk smm smo smp sms smt smu soc sod soe soi sok som soo sop sos sot sou spc spd spe spi spk spm spo spp sps spt spu ss- ssc ssd sse ssi ssk ssm sso ssp sss sst ssu stc std ste sti stk stm sto stp sts stt stu suc sud sue sui suk sum suo sup sus sut suu tcc tcd tce tci tck tcm tco tcp tcs tct tcu tdc tdd tde tdi tdk tdm tdo tdp tds tdt tdu te- tec ted tee tei tek tem teo tep tes tet teu tic tid tie tii tik tim tio tip tis tit tiu tkc tke tkk tkm tko tkp tks tkt tmc tmd tme tmi tmk tmm tmo tmp tms tmt tmu to- toc tod toe toi tok tom too top tos tot tou tpc tpd tpe tpi tpk tpm tpo tpp tps tpt tpu tsc tsd tse tsi tsk tsm tso tsp tss tst tsu ttc ttd tte tti ttk ttm tto ttp tts ttt ttu tuc tud tue tui tuk tum tuo tup tus tut tuu ucc ucd uce uci uck ucm uco ucp ucs uct ucu udc udd ude udi udk udm udo udp uds udt udu uec ued uee uei uem uep ues uet uic uid uie uii uim uio uip uis uit uiu ukc uke uki ukk ukp uku um- umc umd ume umi umm umo ump ums umt umu uoc uod uoe uok uom uoo uop uos uot up- upc upd upe upi upk upm upo upp ups upt upu usc usd use usi usk usm uso usp uss ust usu utc utd ute uti utk utm uto utp uts utt utu uuc uue uum uus uut uuu