bbbb bbeb bebb bebe bebo beeb beek beem beke beko beme beo- beok bobb bobe bobo boee boeo boke boko bomb bome boob booe book boom ebbo eboe eboo eeee eeke eemo ekeb ekek embe embo emek emme kbbb kbbe kbbk kbbm kbbo kbeb kbee kbek kbeo kbkb kbkk kbko kbmb kbme kbmo kbob kboe kbok kboo kebb kebe keek keem kekb keke keko kemb keme kemm kemo keok keom kkbb kkbe kkbo kkkk kkmk kkmo kkob kkoo kmem kmeo kmke kmkk kmko kmme kmmk kmmm kmmo kmob kmoe kmok kmom kobb kobe kobk kobo kokb koke kokk koko komb kome komo koob kook kooo mebe mebo meek meem meke meko meme memo meok mmmm mobb mobe mobo moke moko mome momo moob mooe mook o-eo obbo obkb oboe obok oeme okko okmo okok okom ombe ombo omee omeo omo- omoe omoo oobe oome oooo