nseb nsec nser nsic nsin nsis nskk nsnr nsrc nssb nssc nsse nssr nsss rbbb rbbr rbbs rbis rbss rcbc rccb rccc rccs rcic rcis rcnr rcsc rcsi rcss rebb rebe rebk rebs recc rece reci reck recr recs reeb reek reen rees reii reik rein reir reis reke reki reks rene reni renk renn rens rere reri rers rese resi resn ress rib- ribe ribs ricc rice rick rics riek rien rier ries riin riis rike riki rikk rine rink rinn rire riri rirs risc rise risi risk riss rkss rnbr rncs rnie rnin rrrr rsbi rscc rscn rscs rsee rsis rsnn rsnr rsre s-ib s-ic s-ii sbbs sbcc sbcs sber sbic sbrk sbse sbsi scbi sccc scce sccs scec scee scer sci- scic scie scin scir scis sck- scnr scr- scrc scre scri scrn scrs scsc scsi scsn scsr se-c se-e se-i se-k se-n se-s sebe sebi sebs sec- secc sece seck secn secr secs seeb seec seek seen seer sees seie seii seik sein seir seis seke seki sekk sene seni senn senr sens serb serc sere seri serk sern serr sers sesc sese sesi sess sibc sibe sibi sibs sicc sice sici sick sics siec siek sien sier sies siik sike siki sikr siks sine sini sink sinn sins sirc sire siri sirk sirr sirs sisc sise sisi sisk siss skee skei sken sker skes skic skie skik skin skir skis skn- skss sncc sneb snee sner snes snib snie snir snns snrk snrs srbc srcc sreb srec sres srib sris srni srnn ssbn ssbr sscc ssce ssci sscs ssec ssee sses ssin ssis ssns ssrc ssri ssrs sssb sssc sssi ssss