a-ii aaaa aaab aaai aaar aaba aabb aabi aaib aaii aara aari abaa abab abai abar abax abb- abba abbb abbi abbr abia abib abir abra abri aiai aiba aiia aiib aiir aira airi airx aixa aixi arab arai arar arax arba arbi aria arib arii arr- arra arri arrr axar axi- axia ba-i ba-x baaa baar baba babb babi babr baia baib bair baix bar- bara barb bari barr barx baxi bbbb biar biba bibb bibi bira birb biri birr birx bixa bixi brab brai brax bria brix brrr iaaa iaai iaba iaia iara ibar ibia ibra ibri iiii iira irai irar iri- iria irix irra irri ixia ixxi raab raba rabb rabi raia raii rair raix rara rarb rari raxa raxi rbbb rbbr riaa riab riai rib- riba riia riri rrrr xaar xara xbai xbar xbra xiii xixi xxii xxix xxxi xxxx