rsis rsnn rsnr rsre s-ic s-ii sccc scce sccs scdc scdf scds scec scee scer scfc scfe scfi sci- scic scid scie scif scin scir scis scnd scnr scr- scrc scre scri scrn scrs scsc scsd scsi scsn scsr sdcc sddc sdds sdef sder sdes sdfc sdic sdif sdrc sdrs sdsc sdsf sdss se-c se-d se-e se-f se-i se-n se-s sec- secc secd sece secn secr secs sede seds seec seed seef seen seer sees seff sefi seid seie seif seii sein seir seis send sene seni senn senr sens serc serd sere serf seri sern serr sers sesc sese sesi sess sfcc sfcs sfdc sfer sffc sfne sfrc sfss sicc sice sici sics sidd side sidi sidr sids siec sied sief sien sier sies sife siff sifr sind sine sini sinn sins sirc sire sirf siri sirr sirs sisc sisd sise sisi siss sncc sncf sned snee sner snes snid snie snir snns snrs snsd srcc srde srec sres srfc srfi sris srni srnn srsd sscc ssce ssci sscs ssdc ssdd ssdf ssec ssee sses ssfc ssid ssin ssis ssns ssrc ssri ssrs sssc sssf sssi ssss