sem sen seo sep ses set sev slc sld sle sll slm sln slo slp sls slt slv smc smd sme sml smm smn smo smp sms smt smv snc snd sne snl snm snn sno snp sns snt snv soc sod soe sol som son soo sop sos sot sov spc spd spe spl spm spn spo spp sps spt spv ss- ssc ssd sse ssl ssm ssn sso ssp sss sst ssv stc std ste stl stm stn sto stp sts stt stv svc svd sve svl svm svn svo svp svs svt svv tcc tcd tce tcl tcm tcn tco tcp tcs tct tcv tdc tdd tde tdl tdm tdn tdo tdp tds tdt tdv te- tec ted tee tel tem ten teo tep tes tet tev tlc tld tle tll tlm tln tlo tlp tls tlt tlv tmc tmd tme tml tmm tmn tmo tmp tms tmt tmv tnc tnd tne tnl tnm tnn tno tnp tns tnt to- toc tod toe tol tom ton too top tos tot tov tpc tpd tpe tpl tpm tpn tpo tpp tps tpt tpv tsc tsd tse tsl tsm tsn tso tsp tss tst tsv ttc ttd tte ttl ttm ttn tto ttp tts ttt ttv tvc tvd tve tvl tvm tvn tvo tvp tvs tvt v-e vcc vcd vce vcl vcm vcn vco vcp vcs vct vdc vdd vde vdl vdm vdo vdp vds vdt vdv vec ved vee vel vem ven veo vep ves vet vl- vlc vld vle vll vlm vlo vlp vls vlt vlv vm- vmc vmd vmm vmn vmo vmt vn- vnd vnl vnm vno vnp vns vnv voc vod voe vol vom von voo vop vos vot vov vpc vpd vpe vpl vpm vpn vpo vpp vps vpt vsc vsd vse vsl vsm vsn vso vsp vss vst vsv vtc vte vtl vtm vto vts vtt vtv vvc vvm vvo vvs vvt vvv