-vac a-be aaaa aaab aaac aaae aaav aaba aabb aabc aaca aacb aacc aace aaco aacv aaea aaec aaev aaoe aaoo aava abaa abab abac abae abb- abba abbb abbe abbo abca abcb abcc abec abee aboa abob aboo abov abva acaa acab acac acae acba acca accc acce acco ace- acea acec acev acoa acoe acvv aeac aecb aeva aoba aoca aoce avab avao avcc avce avco avea avec aveo avva avvo baaa baba babb babe babo bac- baca bacc bace baco bava bave bbbb bbeb bcaa bcbc bcca bccc bcec bcvo beav beba bebb bebe bebo beca beeb beo- bevo boab boac boba bobb bobe bobo boca boce boco boea boec boee boeo boob booc booe bova bove bovo c-bo caaa caab caac caba cabe cabo cac- caca cacc cace caco caec cava cave cavo cbac cbbc cbca cbcc cbce cbea cbec cbee cbva cbvb cbve ccaa ccab ccac ccba ccbc ccca cccb cccc cccv ccee ccob ccoc ccvo ceac ceba cec- ceca cece ceco ceeb ceec ceva cevo coba cobb cobe cobo coca coce coco coob cova cove covo cvac cvca cvcc eaba eaca eacc eaec eave ebac ebba ebbc ebbo ebcc eboe eboo ecaa ecac ecao ecbc ecbe ecca eccb eccc ecce ecco eco- eeca eeea eeee eeoc eeva evac evae evea evoe evoo o-eo obba obbo obea obec oboe ocab ocac ocbc occa occc oce ocee oec- oeca oecc oeec ooaa ooba oobe oooo ovee ovo- ovoo vaca vace vaco vava vbcc veba vecc veve vevo voca voce vooc vvob vvvv