a-ii aaaa aaab aaaf aaai aaar aaba aabb aabi aafa aafb aaff aafi aaib aaii aara aari abaa abab abaf abai abar abb- abba abbb abbi abbr abff abia abib abir abra abri afaa afar affa affi afia afib afif afir afr- afra afri aiai aiba aiff aiia aiib aiir aira airi arab araf arai arar arba arbi arfa arfb arff aria arib arif arii arr- arra arri arrr ba-i baaa baaf baar baba babb babi babr baff baia baib bair bar- bara barb barf bari barr bbbb biaf biar biba bibb bibi bifa biff bifi bira birb biri birr brab braf brai bria brrr faaa faba fabi fafa faff fafi fair fara farb farr fbar ffar ffff ffii ffrr fiaa fiaf fiar fiba fifa fiff fifi fiii fira frab fria frib iaaa iaai iaba iaff iaia iara ibar ibfi ibia ibra ibri ifaa ifar ifbb ifra ifrb ifrf ifri iifa iiii iira iraf irai irar iri- iria irra irri raab raaf raba rabb rabi rafa raff rafi raia raif raii rair rara rarb rarf rari rbaf rbbb rbbr riaa riab riai rib- riba rifa riff riia riif riri rrif rrrr