c-cd cccc ccci cccs ccdc ccdi ccds ccic ccid ccii ccis ccix ccsd ccsi ccss ccxi cdcs cdic cdii cdis cdss cdxi cicc cici cics cidc cidi cids ciid ciii ciis cis- cisc cisd ciss cixi cscc cscd csci cscs csid csis csix cssd cxii cxix cxxi cxxx d-ix dccc dcci dccs dcds dcii dcis dcix dcsc dcss dcxi dcxx dddd ddss dici didi dids diii diis dis- disc disd disi diss dixi dscc dscs dssc dssi dxcc dxci dxdc dxds dxii dxix dxss dxxx iccc icci iccs icdc icdd icis icsc icsd icsi icss idic idid idis idsc idss iicd iiii iiis iisc iisd iisi iscc iscd isci iscs isdc isds isic isis issc issi isss ixxi s-ic s-ii sccc sccs scdc scds sci- scic scid scis scsc scsd scsi sdcc sddc sdds sdic sdsc sdss sicc sici sics sidd sidi sids sisc sisd sisi siss sixx sscc ssci sscs ssdc ssdd ssid ssis sssc sssi ssss xcii xcis xdcc xics xidi xiii xisi xixi xxii xxix xxxi xxxx