a-ya a-yo aaaa aaab aaaf aaba aabb aaby aafa aafb aaff aaoo abaa abab abaf abag abay abb- abba abbb abbo abby abff aboa abob abof aboo aboy abyy afaa afao affa affo affy afgf afoa afog afoo ag-o agag agao agay agba agbo agfa agga aggy agob agog agoo agya aoba ay-o ayao ayay ayoo ayya baaa baaf baba babb babo baby baff bafo baga bagg bago bagy baya bayg bayo bbay bbbb bbga bboy bbyo bfgf boab boag boba bobb bobo boby bofa boff boga bogg bogo bogy boob boof boog boya boyf boyg boyo bygg bygo byoa byob faaa faba fabo fafa faff fafg fafo fagg fago faya fayo ffff foaf foba fofo fogg fogo fogy foof foya gaba gabb gabo gaby gafa gafb gaff gaga gagg gago gaya gayo gbag gbbo gffa gfoa ggfg gggg goaf goba gobo goby goff goga gogo goof goog goya goyf oafo obay obba obbo obby oboy ofay off- offa offo offy ofgo ogb ogba ogfy oggy ogoa ogog ooaa ooba ooby ooff oofy oooo yaaf yaba yabo yafa yaff yafo yaga yago yaya yayo yoba yobo yoff yoga yogo yoof yoyo yyff yyyy