a-ii aaaa aaac aaai aaar aaca aacc aaci aacr aaic aaii aara aarc aari acaa acac acai acar acca accc acci aci- acia acic acir acr- acra acrc acrr aiai aica aicc aicr aiia aiic aiir aira airi arac arai arar arc- arca arci aria arii arr- arra arrc arri arrr caaa caac cac- caca cacc caci cacr caia caic cair cara carc cari carr ccaa ccac ccai ccar ccca cccc ccci ccic ccii ccir ccra ccrc ccri ciaa ciar cica cicc cici cicr ciia ciii cira circ ciri cirr crac crai crar crca crcc crcr cria cric iaaa iaac iaai iaca iacc iacr iaia iara iarc icaa icac icai icar icca iccc icci iccr icra icrc icrr iiac iica iiii iira iirc irac irai irar irca ircc iri- iria iric irra irrc irri rac- raca racc raci raia raic raii rair rara rari rcac rccc rcic riaa riai rica ricc riia riri rrrr