a-ii aaaa aaab aaaf aaai aaar aaba aabb aabi aafa aafb aaff aafi aaib aaii aaoo aara aari aaro abaa abab abaf abai abar abb- abba abbb abbi abbo abbr abff abia abib abir aboa abob abof aboo abor abra abri abro afaa afao afar affa affi affo afia afib afif afir afoa afoo afor afr- afra afri afro aiai aiba aibo aiff aiia aiib aiir aioi aira airi airo aoba aora aorb arab araf arai arar arba arbi arfa arfb arff aria arib arif arii ario aroa arob aroi aroo aror arr- arra arri arro arrr ba-i baaa baaf baar baba babb babi babo babr baff bafo baia baib baio bair bar- bara barb barf bari baro barr bbbb biaf biao biar biba bibb bibi bibo bifa biff bifi bio- bioi bira birb biri biro birr boab boai boar boba bobb bobi bobo bofa boff boi- boii boob boof boor bor- bora borf bori boro borr brab braf brai brao bria brio broa brob broo bror brrr faaa faba fabi fabo fafa faff fafi fafo faio fair fara farb faro farr fbar ffar ffff ffii ffrr fiaa fiaf fiar fiba fifa fiff fifi fifo fiii fior fira foaf foar foba fofo foia foof for- fora forb fori foro forr frab fria frib frio frob iaaa iaai iaba iaff iaia iara ibar ibfi ibia ibra ibri ibro ifaa ifao ifar ifbb ifor ifra ifrb ifrf ifri iifa iiii iiio iioi iioo iira ioba iobi ioii ioio ioof iooi iooo iora iori iraf irai irao irar iri- iria irio irob irra irri oafo oara obai obba obbo obia oboi obor obra obri obro off- offa offo offr ofor ofra oiba oiii oira ooaa ooba oobi ooff ooia oooo oora orab orai orao orar orba orbb orbi orbo orff orfi ori- oria orif orio oro- orof oror orra orri orro raab raaf raba rabb rabi rabo rafa raff rafi raia raif raii rair raob rara rarb rarf rari raro rbaf rbbb rbbr riaa riab riai rib- riba ribo rifa riff riia riif riri roab roaf roar rob- roba robb robi robo roff rofo roia roif roio roir roob roof rooi roor rora rori roro rrif rrrr