a-ak a-ok a-ya a-yo aaaa aaab aaav aaba aabb aaby aaka aaoo aava abaa abab abak abay abb- abba abbb abbo abby aboa abob abok aboo abov aboy abva abyy akaa akao akay akka akko akok aoba avab avao avay avoy avva avvo avvy ay-o ayao ayay ayoo ayya baaa baak baba babb babo baby bak- baka bako bava baya bayo bbay bbbb bboy bbyo boab boak boba bobb bobo boby boka boko boob book bova bovo bovy boya boyo byoa byob kaaa kaab kaak kaay kaba kabb kabo kaby kaka kakk kako kaoa kaok kava kavb kavo kavv kaya kayo kbaa kbab kbak kbay kbba kbbb kbbk kbbo kbkb kbkk kbko kbkv kbky kboa kbob kbok kboo kbov kbva kbvb kbvo kbya kbyb kbyo kkaa kkay kkba kkbb kkbo kkkk kkoa kkob kkoo kkov kkoy kkvv kkya kkyy koab koak koay koba kobb kobk kobo koby koka kokb kokk koko koky koob kook kooo koov kova kovk kovo koya koyo koyy kvab kvak kvay kvoa kvob kvok kvoo kvov kvvv kvyb kyaa kyak kyay kyba kybb kybo kyby kyka kykk kykv kyky kyok kyoo kyoy kyva 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 ovo- ovoo oyak vaka vava vaya vayk vbyv voay voka voky vovk vvob vvvv yaak yaba yabo yaka yako yava yaya yayo ykko yoak yoav yoba yobo yoko yoky yook yova yoyo yyyy