ridd ride ridi rids ried riep rier ries riis ripd ripe ripi ripp ripr rips rire riri rirs risc risd rise risi risp riss rpcs rpdp rpii rpps rred rrrr rrsp rsbi rscc rscs rsdd rsds rsee rsid rsis rspb rsps rsre s-ib s-ic s-ii sbbs sbcc sbcs sbds sber sbic sbsd sbse sbsi sbsp scbi sccc scce sccp sccs scdc scdp scds scec scee scep scer sci- scic scid scie scip scir scis scpb scpe scpi scps scr- scrc scre scri scrs scsc scsd scsi scsr sdcc sddc sdds sdep sder sdes sdib sdic sdpr sdps sdrc sdrs sdsc sdss se-c se-d se-e se-i se-s sebe sebi sebs sec- secc secd sece secr secs sede seds seeb seec seed seep seer sees seid seie seii seip seir seis sepd sepe sepi sepp sepr seps serb serc serd sere seri serp serr sers sesc sese sesi sess sibc sibe sibi sibs sicc sice sici sicp sics sidd side sidi sidr sids siec sied sier sies sipc sipe sipi sipp sips sirc sire siri sirp sirr sirs sisc sisd sise sisi siss spcc spcs spdc spde spdp spdr speb spec sped spee sper spes spib spic spie spip spir spis sppd spps sprd spri sprs spsd spse spsp spss srbc srcc srde sreb srec sres srib sris srpc srps srsd srsp ssbr sscc ssce ssci sscp sscs ssdc ssdd ssdp ssec ssee ssep sses ssid ssis sspc sspe ssps ssrc ssri ssrs sssb sssc sssi ssss