a-ii aaaa aaab aaai aaar aaba aabb aabi aaib aaii aara aari abaa abab abai abaj abar abb- abba abbb abbi abbr abia abib abir abra abri aiai aiba aiia aiib aiir aija aira airi ajab ajar ajba ajri arab arai arar arba arbi aria arib arii arij arja arr- arra arri arrr ba-i baaa baar baba babb babi babr baia baib bair baja baji bar- bara barb bari barr bbbb biaj biar biba bibb bibi bija biji bira birb biri birr brab brai braj bria brrr iaaa iaai iaba iaia iara ibar ibia ibra ibri iiii iira ijji irai iraj irar iri- iria irra irri jaar jaba jabi jabr jair jaja jaji jara jari jarr jbaa jbar jibb jibi jiji jira jiri jjar jrbr raab raaj raba rabb rabi raia raii rair raja raji rara rarb rari rbbb rbbr riaa riab riai rib- riba riia riji riri rrrr