sbsd sbse sbsp sccc scce sccp sccs scdc scdp scds scec scee scep scer scob scoo scop scor scpb scpe scpo scps scr- scrc scre scrs scsc scsd scso scsr sdcc sdco sddc sdds sdep sder sdes sdpr sdps sdrc sdrs sdsc sdss se-c se-d se-e se-o se-s sebe sebo sebs sec- secc secd sece seco secr secs sede sedo seds seeb seec seed seep seer sees seoc seod seop sepd sepe sepo sepp sepr seps serb serc serd sere sero serp serr sers sesc sese seso sess sobe sobo sobp sobr sobs soce soco socr socs sodd sode sodo sods soec soeo soep soes sood soop soor soos sopd sope sopo sopp sops sorb sord sore soro sorr sors sose soso soss spcc spco spcs spdc spde spdp spdr speb spec sped spee sper spes spoc spod spoo spop spor spos sppd spps sprd spro sprs spsd spse spso spsp spss srbc srcc srde sreb srec sreo sres sros srpc srps srsd srsp ssbr sscc ssce sscp sscs ssdc ssdd ssdp ssec ssee ssep sses ssoc ssop sspc sspe sspo ssps ssrc ssrs sssb sssc ssss