-ana a-ak aaaa aaab aaaf aaan aaba aabb aafa aafb aaff aaka aana abaa abab abaf abak aban abb- abba abbb abff afaa afak afan affa afka akaa akan akka akna ana- anaa anab anak anan anba anbb anfa ank- anka anna annb baaa baaf baak baan baba babb baff bak- baka bana bank bann bbbb bbfn f--k faaa faan faba fafa faff fana fank ffff fkab kaaa kaab kaaf kaak kaan kaba kabb kabf kafa kaff kafn kaka kakk kakn kana kanb kanf kann kbaa kbab kbak kbba kbbb kbbf kbbk kbfb kbff kbfk kbkb kbkf kbkk kbna kbnn kfab kfan kfbk kfbn kffa kffb kfff kffk kffn kfka kfkb kfna kfnf kfnk kfnn kkaa kkan kkba kkbb kkbn kkfn kkkk kknb kknn knaa knab knaf knan knba knbb knbn knfa knkk knnb knnk naaa naab naan naba nabf nabk nafa naff naka nan- nana nanb nann nbaa nbaf nbak nbfa nfaa nfff nnnn