s-os sccc scce sccl sccs scec scee scel scer scfc scfe sck- sckl scl- sclc sclk scls scok scol scoo scor scr- scrc scre scrs scsc scsl scso scsr se-c se-e se-f se-k se-o se-s sec- secc sece seck seco secr secs seec seef seek seel seer sees seff sefl seke sekk seko sele self selk sell selo sels seoc seok seol serc sere serf serk sero serr sers sesc sese seso sess sfcc sfco sfcs sfer sffc sflc sfls sfor sfos sfrc sfro sfss skee skel skeo sker skes skfc skoe skol skor skss slcc slee sler sles sloc sloe sloo slos slrc slre slrs slsc soce sock socl soco socr socs soec soel soeo soes sofo soke sokk soko sole solf solk soll solo solr sols soof sook sool soor soos sore soro sorr sors sose soso soss srcc srec sreo sres srfc sros sscc ssce sscs ssec ssee sses ssfc ssfl sslc ssle ssoc ssrc ssrl ssrs sssc sssf ssss