aaaa aaab aaaf aaal aaar aaba aabb aabl aafa aafb aaff aafl aala aall aalo aaoo aara aaro abaa abab abaf abal abar abb- abba abbb abbo abbr abff abla ablo aboa abob abof abol aboo abor abra abro afaa afao afar affa affo afla afoa afol afoo afor afr- afra afro alaa alal alao alar alb- alba albo alfa all- alla alll allo allr aloa alof alol aloo alor alro aoba aola aora aorb arab araf aral arar arba arfa arfb arff arla arlo aroa arob aroo aror arr- arra arro arrr baaa baaf baal baar baba babb babo babr baff bafo bala balf ball balo baol bar- bara barb barf baro barr bbbb bblb bffl blaa blab blob bloo boab boal boar boba bobb bobo bofa boff bola boll bolo boob boof bool boor bor- bora borf boro borr brab braf brao broa brob brol broo bror brrr faaa faba fabo fafa faff fafo fala fall falo fara farb farl faro farr fbar fbla ffar ffff ffrr flab flao flob floo flor foaf foal foar foba fofo fola foll folo folr foof fool for- fora forb forl foro forr frab frla frob frol laaa laal laar laba labo labr lafb laff lala lall lalo lara larb larf larr lbar lblr llao llll lloa lloo loaf loar lob- loba lobb lobo lofa loff lola loll lolo loob loof lool loor lora loro lral lrba lrrr oafo oall oara obal obba obbo obla obol obor obra obro off- offa offo offr ofla ofor ofra olaf olar olba olbo olfa olla ollo olof olor ooaa ooba ooff oola oolo oooo oora orab oral orao orar orba orbb orbo orff orla orlo oro- orof oror orra orro raab raaf raba rabb rabl rabo rafa raff rala ralb ralf rall ralo raob raol rara rarb rarf raro rbaf rbbb rbbr rffl rlab roab roaf roar rob- roba robb robo roff rofl rofo rola rolf roll rolo roob roof rool roor rora roro rrrr