a-be aaaa aaab aaae aaaf aaar aaba aabb aaea aafa aafb aaff aara aare abaa abab abae abaf abaj abar abb- abba abbb abbe abbr abee aber abff abra aeaf aeer aer- aera afaa afar afee afer affa afr- afra afre ajab ajar ajba ajee ajef arab arae araf arar arba arbe area aree aref arfa arfb arff arja arje arr- arra arre arrr baaa baaf baar baba babb babe babr baer baff baja bar- bara barb bare barf barr bbbb bbeb beaf bear beba bebb bebe beeb beef beej beer befa befe beff beja bera bere berr bjfe brab brae braf braj brea breb bree bref brer brje brrr eaaf eaba eafb eara earb eare ebba ebbr eber eeea eeee eefa eefe eera efab efbr effa ejer eraf erba erbb erbe ereb erer erja erra erre faaa faba fabe faeb fafa fafe faff faja fajr fara farb fare farr fbar feaf fear feba feeb feer fefe feff fera ferb fere ferr ffar ffee ffff ffrr frab frae frea free jaaf jaar jaba jabr jaer jafa jaff jafr jaja jara jare jarf jarr jbaa jbar jear jebb jebe jeer jefe jeff jera jere jjar jrbr raab raaf raaj raba rabb rabe raef raer rafa rafe raff raja raje rara rarb rare rarf rbaf rbbb rbbr rea- reae reaf rear reba rebb rebe reeb reef refe reff refr reja rera rere rfae rfef rrrr