osco osii osik osin osis oski osno osnr osoi osoo osor osos osro ossb ossi osso rbbb rbbr rbbs rbis rbss rcbc rcbo rccb rccc rccs rcic rcis rcnr rcon rcos rcsc rcsi rcss rib- ribo ribs ricc rick rico rics riin riis riki rikk rink rinn rino rion rios riri rirs risc risi risk riso riss rkos rkss rnbr rnco rncs rnin rob- robb robi robo robs rocc rock roco rocs roik roin roio roir rois roki rokk roko rokr roks ronc roni ronk rono rons roob rooi rook roon roor roos rorc rori rork roro rosc rosi roso ross rrrr rsbi rscc rscn rscs rsis rsnn rsno rsnr rsos s-ib s-ic s-ii s-os sbbs sbcc sbcs sbic sbor sbrk sbsi scbi sccc sccs sci- scic scin scio scir scis sck- scnr scob scok scon scoo scor scr- scrc scri scrn scrs scsc scsi scsn scso scsr sibc sibi sibo sibs sicc sici sick sico sics siik siki siko sikr siks sini sink sinn sino sins sion sior sios sirc siri sirk siro sirr sirs sisc sisi sisk siss skic skik skin skio skir skis skn- skon skor skss sncc snco snib snir snns snob snoc snoo snor snos snrk snrs sobo sobr sobs soci sock soco socr socs soic soik soin soir sois soki sokk sokn soko son- soni sonk sono sons sook soon soor soos sorb sori sorn soro sorr sors sosi soso soss srbc srcc srib sris srni srnn srno sros ssbn ssbr sscc ssci sscs ssin ssis ssns ssoc ssrc ssri ssrs sssb sssc sssi ssss