a-be a-wa aaaa aaab aaae aaav aaba aabb aabw aaea aaev aaoe aaoo aaow aava aaww abaa abab abae abaw abb- abba abbb abbe abbo abee aboa abob aboo abov abow abva abwa abwe aeva aoba avab avao avea aveo avow avva avvo awae awbe awe- aweb awee awoo awow awwa baaa baba babb babe babo bava bave baw- bawe bbbb bbeb beav beaw beba bebb bebe bebo beeb beo- bevo bewa bewe boab boba bobb bobe bobo bobw boea boee boeo boob booe boow bova bove bovo bowa bowe bwaa eaba eave ebba ebbo ebbw eboe eboo ebow eeea eeee eeva evae evea evoe evoo ewew o-eo obba obbo obea oboe ooaa ooba oobe oooo ovee ovo- ovoo owea owoe owow owwa vava vawe veba veve vevo vewe vowe vvob vvvv waaa waao waav waaw waba wabb wabe wabo wabv wabw waeb waee waev waew waob waoe waoo waov waow wava wave wavo wavv wavw wawa wawb wawe wawo wbaa wbab wbae wbbb wbbe wbbo wbbv wbbw wbea wbeb wbev wbew wbob wbow wbva wbvb wbve wbwb wbwo wbwv weaa weao weav webb webe webo weeb weeo weev weoa weow weva weve wevo wewe wewo woaa woab woba wobb wobe wobo woob woow wove wovo wovv wowb wowe wowo woww wvab wvba wvbb wvbe wvbo wvbv wvbw wvee wvob wvoe wvov wvow wvva wvvb wvve wvvv wvwa wvwv wwab wwav wwba wwbb wwea wweb wweo wwow wwva wwvb wwwa wwwe wwwv wwww