a-ii aaaa aaac aaai aaas aaca aacc aaci aacs aaic aaii aais aasa aasc aasi aass acaa acac acai acas acca accc acci accs aci- acia acic acis acsa acsc acsi acss aiai aias aica aicc aics aiia aiic aisa aisi aixa aixi asaa asac asai asas asc- asca ascc asci ascx asia asic asii asis asix assa assc assi asss axi- axia axis caaa caac caas cac- caca cacc caci caia caic cais caix casa casc casi cass caxa ccaa ccac ccai ccas ccca cccc ccci cccs ccic ccii ccis ccix ccsa ccsi ccss ccxi ciaa cias cica cicc cici cics ciia ciii ciis cis- cisa cisc ciss cixi csaa csac csas cscc csci cscs csia csis csix cssa cxii cxix cxxi cxxx iaaa iaac iaai iaas iaca iacc iacs iaia iais iasa iasc iasi icaa icac icai icas icca iccc icci iccs icis icsa icsc icsi icss iiac iias iica iiii iiis iisc iisi is-a isac isai isas isca iscc isci iscs isia isic isis issa issc issi isss ixia ixxi s-ic s-ii sa-c sa-x saac saas saca sacc saci sacs saia saic sais saix sasa sasc sasi sass saxa saxi scaa scac scai scas sccc sccs sci- scia scic scis scsa scsc scsi siaa siac siai sias sica sicc sici sics sisa sisc sisi siss sixa sixx ssaa ssac ssas ssca sscc ssci sscs ssis sssa sssc sssi ssss xcas xcii xcis xica xics xiii xisi xixi xxii xxix xxxi xxxx