aaaa aaab aaar aaba aabb aaoo aara aaro abaa abab abaj abar abb- abba abbb abbo abbr aboa abob aboo abor abra abro ajab ajao ajar ajba ajob ajoo aoba aora aorb arab arar arba arja arjo aroa arob aroo aror arr- arra arro arrr baaa baar baba babb babo babr baja bar- bara barb baro barr bbbb bjoa boab boar boba bobb bobo bojo boob boor bor- bora borj boro borr brab braj brao broa brob broo bror brrr j-ro jaar jaba jabo jabr jaja jara jaro jarr jbaa jbar jbob jjar joab joao joar joba jobo jojo joor jora joro jrbr oara obba obbo obja obor obra obro ooaa ooba oooo oora orab orao orar orba orbb orbo oro- oror orra orro raab raaj raba rabb rabo raja rajo raob rara rarb raro rbbb rbbr roab roar rob- roba robb robo roja rojo roob roor rora roro rrrr