a-ya a-yo aaaa aaab aaar aaav aaba aabb aaby aaoo aara aaro aava abaa abab abar abay abb- abba abbb abbo abbr abby aboa abob aboo abor abov aboy abra abro abry abva abyy aoba aora aorb arab arar aray arba arby aroa arob aroo aror arr- arra arro arrr arry arva arvo arvy ary- arya avab avao avar avay avor avoy avra avro avry avva avvo avvy ay-o ayao ayar ayay ayoo ayra ayry ayya baaa baar baba babb babo babr baby bar- bara barb baro barr bary bava baya bayo bbay bbbb bboy bbyo boab boar boba bobb bobo boby boob boor bor- bora boro borr bory bova bovo bovy boya boyo brab brao brav 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 orav oray orba orbb orbo orby oro- oror oroy orra orro orry orvr orya ovar ovo- ovoo ovra raab raba rabb rabo raby raob rara rarb raro rary rava raya rayr rbbb rbbr roab roar rob- roba robb robo roby roob roor rora roro rory rova rovo roya rrrr ryba ryob vaar vara varr vary vava vaya vayr vbyv voar voay voor vor- vora voro vory vrav vray vrba vvob vvvv yaar yaba yabo yara yarb yaro yarr yarv yary yava yaya yayo ybor ybry yoar yoav yoba yobo yoro yory yova yoyo yvor yyyy