rkkf rkss rlcs rlee rlef rlif rlls rrfc rrif rrle rrrr rscc rscs rsee rsfc rsis rslc rsre rssl s-ic s-ii sccc scce sccl sccs scec scee scel scer scfc scfe scfi sci- scic scie scif scil scir scis sck- sckl scl- sclc sclk scls scr- scrc scre scri scrs scsc scsi scsl scsr se-c se-e se-f se-i se-k se-s sec- secc sece seck secr secs seec seef seek seel seer sees seff sefi sefl seie seif seii seik seil seir seis seke seki sekk sele self seli selk sell sels serc sere serf seri serk serr sers sesc sese sesi sess sfcc sfcs sfer sffc sflc sfls sfrc sfss sicc sice sici sick sics siec sief siek siel sier sies sife siff sifl sifr siik sike siki sikr siks sil- silc sile silf sili silk sill sils sirc sire sirf siri sirk sirr sirs sisc sise sisi sisk siss skee skei skel sker skes skfc skic skie skif skik skil skir skis skss sl-i slcc slee sler sles slic slie slik slir slrc slre slrs slsc srcc srec sres srfc srfi sris sscc ssce ssci sscs ssec ssee sses ssfc ssfl ssis sslc ssle ssrc ssri ssrl ssrs sssc sssf sssi ssss