a-ya aaaa aaab aaac aaar aaba aabb aabc aaby aaca aacb aacc aacr aacy aara aarc abaa abab abac abar abay abb- abba abbb abbr abby abca abcb abcc abcr abra abrc abry abyc abyy acaa acab acac acar acba acca accc accy acr- acra acrc acrr acry arab arac arar aray arba arby arc- arca arr- arra arrc arrr arry ary- arya ayar ayay ayca ayra ayry ayya baaa baar baba babb babr baby bac- baca bacc bar- bara barb barc barr bary baya bbay bbbb bbrc bcaa bcar bcbc bcca bccc bcra brab brac bray brca brcb brrr bry- brya byar caaa caab caac caba caby cac- caca cacc cacr cara carb carc carr cary cayr cbac cbar cbbc cbca cbcc cbcr cbry ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccra ccrc crab crac crar cray crbc crca crcc crcr cry- crya cryb cya- cyaa cyar cyba cybb cybc cyc- cyca cycb cycc cyra cyy- cyyc raab raba rabb raby rac- raca racc racy rara rarb rary raya rayr rbbb rbbr rcac rcbc rccb rccc rcyc rrrr ryba yaar yaba yacc yacy yara yarb yarr yary yaya ybry ycab yccc yyyy