sck- scpa scpb scpe scps scr- scra scrc scre scrs scsa scsc scsd scsr sdae sdak sdap sdba sdcc sddc sdds sdep sder sdes sdpr sdps sdrc sdrs sdsc sdss se-c se-d se-e se-k se-s seaa seab seac sead seak seap sear seas seba sebe sebs sec- seca secc secd sece seck secr secs seda sede seds seea seeb seec seed seek seep seer sees seka seke sekk sepa sepd sepe sepp sepr seps sera serb serc serd sere serk serp serr sers sesa sesc sese sess skab skac skad skap skar sked skee skep sker skes skpc skra sksd skss sp-a spac spad spae spak spap spar spas spca spcc spcs spdc spde spdp spdr spea speb spec sped spee spek sper spes spke spkr sppd spps sprd sprs spsa spsd spse spsp spss sras srbc srcc srde sreb srec sres srpc srps srsd srsp ssaa ssab ssac ssap ssas ssbr ssca sscc ssce sscp sscs ssdc ssdd ssdp ssec ssee ssep sses sspa sspc sspe ssps ssra ssrc ssrs sssa sssb sssc ssss