a-be a-ii aaaa aaab aaae aaai aaar aaba aabb aabi aaea aaib aaii aara aare aari abaa abab abae abai abar abb- abba abbb abbe abbi abbr abee aber abia abib abie abir abra abri aebi aeer aer- aera aeri aiai aiba aiea aiee aiia aiib aiir aira aire airi arab arae arai arar arba arbe arbi area aree arei aria arib arie arii arr- arra arre arri arrr ba-i baaa baar baba babb babe babi babr baer baia baib baie bair bar- bara barb bare bari barr bbbb bbeb bear beba bebb bebe bebi beeb beer beia beir bera bere beri berr biar biba bibb bibe bibi bieb bier bira birb bire biri birr brab brae brai brea breb bree brei brer bria brie brrr eaba eara earb eare ebba ebbr eber eeea eeee eera eiei eier eira eire erba erbb erbe ereb erei erer eria erie erra erre i-be iaaa iaai iaba iaea iaia iara iare ibar ibea ibia ibie ibra ibri ieie iera iere ieri iiie iiii iira irae irai irar irbe iree irer iri- iria irie irra irre irri raab raba rabb rabe rabi raer raia raie raii rair rara rarb rare rari rbbb rbbr rea- reae rear reba rebb rebe reeb reia reii reir rera rere reri riaa riab riai rib- riba ribe rier riia rire riri rrrr