aaaa aaab aaam aaar aaav aaba aabb aabm aama aamb aamo aamr aaoo aara aarm aaro aava abaa abab abam abar abb- abba abbb abbo abbr abma abmb aboa abob aboo abor abov abra abro abva amaa amam amar amb- amba ambo ambr amm- amma ammo amob amoo amor amra amro aoba aoma aora aorb arab aram arar arba arma armm armo aroa arob arom aroo aror arr- arra arro arrr arva arvo avab avao avar avma avor avra avro avva avvo baaa baam baar baba babb babm babo babr bama bamb bamm bar- bara barb barm baro barr bava bbbb bmaa boab boar boba bobb bobo boma bomb boob boom boor bor- bora borm boro borr bova bovo brab bram brao brav broa brob brom broo bror brrm brrr brvm maaa maam maar maba mabo mama mamo maor mar- mara marm maro marr marv mava mavo mbam mbav mbba mmaa mmab mmar mmmm mmor moaa moab moam moar moba mobb mobo moma momo mooa moob moor moov mora morb moro mova mrbb mrbm oama oara obba obbo obor obra obro omam omao omar ombo omma omo- omoa omoo omor omov omra omro ooaa ooba ooma oooo oora orab oram orao orar orav orba orbb orbo orma ormo oro- orom oror orra orro orvr ovar ovo- ovoo ovra raab raam raba rabb rabo rama ramb ramm ramo raob raom rara rarb raro rava rbbb rbbr rmmv rmvb roab roam roar rob- roba robb robo roma romb romm romo roob room roor rora roro rova rovo rrrr vaar vama vamo vara varm varr vava voar voom voor vor- vora vorm voro vram vrav vrba vvob vvvv