cccc ccci cccs ccic ccii ccir ccis ccrc ccri ccrs ccsi ccss cicc cici cicr cics ciii ciis circ ciri cirr cirs cis- cisc cisr ciss cisy crcc crcr cric cris crss cry- crys cscc csci cscr cscs csir csis csrc csrs cssr csys cyc- cycc cycs cyrs cyy- cyyc iccc icci iccr iccs icis icrc icrr icrs icry icsc icsi icsr icss iiii iiis iirc iirs iisc iisi iisr ircc ircs iri- iric iris iriy irrc irri irrs iscc isci iscr iscs isic isis isri issc issi issr isss issy isys rccc rccs rcic rcis rcsc rcsi rcss rcyc ricc rics riis riri rirs risc risi riss rrrr rscc rscs rscy rsis ryis rysy s-ic s-ii sccc sccs sccy sci- scic scir scis scr- scrc scri scrs scry scsc scsi scsr sicc sici sics sirc siri sirr sirs sisc sisi siss sisy siyi srcc sris sscc ssci sscs ssis ssrc ssri ssrs sssc sssi ssss sycr syis syrs syry syss yccc yirr yiss ysii yyyy