a-ya a-yo aaaa aaab aaar aaba aabb aaby aaoo aara aaro abaa abab abar abay abb- abba abbb abbo abbr abby aboa abob aboo abor aboy abra abro abry abyy aoba aora aorb arab arar aray arba arby aroa arob aroo aror arr- arra arro arrr arry ary- arya ay-o ayao ayar ayay ayoo ayra ayry ayya baaa baar baba babb babo babr baby bar- bara barb baro barr bary baya bayo bbay bbbb bboy bbyo boab boar boba bobb bobo boby boob boor bor- bora boro borr bory boya boyo brab brao bray broa brob broo bror brrr bry- brya bryo byar byoa byob oara oary obay obba obbo obby obor oboy obra obro ooaa ooba ooby oooo oora oory orab orao orar oray orba orbb orbo orby oro- oror oroy orra orro orry orya raab raba rabb rabo raby raob rara rarb raro rary raya rayr rbbb rbbr roab roar rob- roba robb robo roby roob roor rora roro rory roya rrrr ryba ryob yaar yaba yabo yara yarb yaro yarr yary yaya yayo ybor ybry yoar yoba yobo yoro yory yoyo yyyy