a-ak a-ok a-ya a-yo aaaa aaab aaba aabb aaby aaka aaoo abaa abab abak abay abb- abba abbb abbo abby aboa abob abok aboo aboy abyy akaa akao akay akka akko akok aoba ay-o ayao ayay ayoo ayya baaa baak baba babb babo baby bak- baka bako baya bayo bbay bbbb bboy bbyo boab boak boba bobb bobo boby boka boko boob book boya boyo byoa byob kaaa kaab kaak kaay kaba kabb kabo kaby kaka kakk kako kaoa kaok kaya kayo kbaa kbab kbak kbay kbba kbbb kbbk kbbo kbkb kbkk kbko kbky kboa kbob kbok kboo kbya kbyb kbyo kkaa kkay kkba kkbb kkbo kkkk kkoa kkob kkoo kkoy kkya kkyy koab koak koay koba kobb kobk kobo koby koka kokb kokk koko koky koob kook kooo koya koyo koyy kyaa kyak kyay kyba kybb kybo kyby kyka kykk kyky kyok kyoo kyoy kyya kyyk kyyo kyyy oaky obak obay obba obbo obby obkb obok oboy okak okay okby okka okko okok okyo ooaa ooak ooba ooby ooky oooo oyak yaak yaba yabo yaka yako yaya yayo ykko yoak yoba yobo yoko yoky yook yoyo yyyy