a-ii aaaa aaab aaaf aaai aaba aabb aabi aafa aafb aaff aafi aaib aaii aaoo abaa abab abaf abai abb- abba abbb abbi abbo abff abia abib aboa abob abof aboo afaa afao affa affi affo afia afib afif afoa afoo aiai aiba aibo aiff aiia aiib aioi aoba ba-i baaa baaf baba babb babi babo baff bafo baia baib baio bbbb biaf biao biba bibb bibi bibo bifa biff bifi bio- bioi boab boai boba bobb bobi bobo bofa boff boi- boii boob boof faaa faba fabi fabo fafa faff fafi fafo faio ffff ffii fiaa fiaf fiba fifa fiff fifi fifo fiii foaf foba fofo foia foof iaaa iaai iaba iaff iaia ibfi ibia ifaa ifao ifbb iifa iiii iiio iioi iioo ioba iobi ioii ioio ioof iooi iooo oafo obai obba obbo obia oboi off- offa offo oiba oiii ooaa ooba oobi ooff ooia oooo