-ana aaaa aaab aaaf aaan aaar aaav aaba aabb aafa aafb aaff aana aaon aaoo aara aaro aava abaa abab abaf aban abar abb- abba abbb abbo abbr abff aboa abob abof abon aboo abor abov abra abro abva afaa afan afao afar affa affo afoa afoo afor afr- afra afro ana- anaa anab anan anao anar anba anbb anbo anfa anfo anna annb anno ano- anoa anon anor aoba aonb aono aora aorb aorn arab araf aran arar arba arfa arfb arff arna arno aroa arob aron aroo aror arr- arra arro arrr arva arvn arvo avab avan avao avar avon avor avra avro avva avvo baaa baaf baan baar baba babb babo babr baff bafo bana bann bano banr baon bar- bara barb barf barn baro barr bava bbbb bbfn bnor bnrr boab boan boar boba bobb bobo bofa boff bona bonn bono boob boof boon boor bor- bora borf born boro borr bova bovo brab braf bran brao brav brna brno broa brob bron broo bror brrr faaa faan faba fabo fafa faff fafo fana fano faon fara farb faro farr fava fbar ffar ffff ffrr fnar foaf foan foar foba fofo fono foof foon for- fora forb forn foro forr fr-v frab fran frob fron naaa naab naan naar naba nabf nabo nafa naff nafo nan- nana nanb nann nano naor nara narf narn naro narr nava navo navr navv nbaa nbaf nbar nbbo nbfa nfaa nfff nfon nfra nnnn noaa noba nobo non- nona nonn nono noo- noob noon nooo noor noov nor- nora norb norf norn noro norr norv nov- nova novo nrab nrna nron nvfr oafo oara oban obba obbo obfv obon obor obra obro ofan off- offa offo offr ofna ofno ofor ofra onab onan onar onna onno onon onor onra ooaa ooba ooff oona oooo oora orab oran orao orar orav orba orbb orbo orff orna orno oro- orof oron oror orra orro orvr ovan ovar ovo- ovon ovoo ovra raab raaf raan raba rabb rabo rafa raff rana rann rano raob rara rarb rarf raro rava rbaf rbbb rbbr rnaf rnbr roab roaf roan roar rob- roba robb robo roff rofo rona rono roob roof roon roor rora roro rova rovo rrna rrrr vaan vaar vafa vana vann vano vara varf varn varr vava vfor vnav voar voff vofr vona vonn voor vor- vora voro vran vrav vrba vrnn vron vvob vvvv