a-be a-fu a-ya aaaa aaab aaae aaaf aaba aabb aaby aaea aafa aafb aaff abaa abab abae abaf abau abay abb- abba abbb abbe abby abee abey abff abua abue abuf abuy abye abyy aeaf aeby afaa afee affa affy afua afue afye auaa aube auby aufe ayay ayub ayya baaa baaf baba babb babe babu baby baff bau- bauf baya baye bayu bbau bbay bbbb bbeb beaf beau beay beba bebb bebe beby beeb beef beey befa befe beff beya beye buba bubb bube bubu buea bueu bufe buff buyu eaaf eaba eafb ebay ebba ebby ebya eeby eeea eeee eefa eefe efab effa effy efua efya euba eyeb eyey faaa faba fabe fabu faeb fafa fafe faff faue faya faye fayu feaf feba feeb fefe feff ffee ffff fubb fubu fuff fufu fuyu fyfe uafa uaua ubay ubba ubbe ueba uefa ufay uffa uffe uuuu uyea yaaf yaba yafa yafe yaff yaue yaya yayu ye-u yeaf yefe yeff yeue yeye yuba yubu yuea yuff yufu yuya yuye yuyu yyfe yyff yyyy