a-wa aaaa aaab aaaf aaar aaba aabb aabw aafa aafb aaff aaoo aaow aara aaro aaww abaa abab abaf abar abaw abb- abba abbb abbo abbr abff aboa abob abof aboo abor abow abra abro abwa abwr afaa afao afaq afar affa affo affw afoa afoo afor afqa afr- afra afro aoba aora aorb aqar aqof aqra aqw- aqwa arab araf araq arar araw arba arfa arfb arff aroa arob aroo aror arow arq- arqa arr- arra arro arrr arwa awar awoo awow awro awwa baaa baaf baar baba babb babo babr baff bafo bafq baqa bar- bara barb barf baro barq barr baw- bbbb bbbq bbwr boab boar boba bobb bobo bobw bofa boff boob boof boor boow bor- bora borf boro borr borw bowa bowr brab braf brao braw broa brob broo bror brow brrr bwaa faaa faba fabo fafa faff fafo fara farb faro farr fawf fbar ffar ffff ffrr foaf foar foba fofo foof for- fora forb foro forr frab frob frow oafo oara obba obbo oboq obor obra obro off- offa offo offr ofor ofra ooaa ooba ooff oooo oora orab orao orar orba orbb orbo orff oro- orof oror orra orro orwa orwo owar owow owwa qaaf qabo qafa qara qoob qqqq raab raaf raba rabb rabo rafa raff raob rara rarb rarf raro rawa rawr raww rbaf rbbb rbbr roab roaf roar rob- roba robb robo roff rofo roob roof roor rora roro rowa rowb rowf rowr roww rrrr waaa waaf waao waaq waar waaw waba wabb wabf wabo wabq wabr wabw wafa wafb waff wafr waob waoo waor waow waqa waqb waqf waqq war- wara warb warf waro warq warr warw wawa wawb wawf wawo wbaa wbab wbaf wbar wbbb wbbf wbbo wbbr wbbw wbfa wbfb wbff wbfo wbfr wbfw wbob wboq wbor wbow wbqb wbrb wbrf wbrq wbrr wbrw wbwb wbwo wfaa wfab wfar wfaw wfbf wfbq wfbr wfff wfob wfor wfra wfrb wfrf wfro wfrq wfrw wfwa wfwo woaa woab woar woba wobb wobo woff wofr woob woof woow wora worb worf woro worq worr worw wowb wowf wowo wowq woww wqab wqaq wqar wqba wqbb wqbq wqbr wqor wqow wqqa wqqb wqqo wqqq wqqw wqrb wqrw wraa wrab wraf wrao wrar wraw wrba wrbb wrbf wrbo wrbw wrfb wrff wrfq wrfw wroa wrob wroo wroq wrow wrqq wrqr wrra wrrb wrro wrrq wrrw wrwa wrwb wrwr wwab wwba wwbb wwbf wwbr wwfa wwfr wwfw wwof wwor wwow wwqa wwra wwrb wwrf wwrr wwrw wwwa wwwq wwwr wwww