a-be a-ha aaaa aaab aaad aaae aaah aaav aaba aabb aabd aabh aada aade aaea aaev aaha aava abaa abab abad abae abb- abba abbb abbe abda abed abee abha abva abvd adaa adab adad adae adah adba adda addd adde adea adeb adee adeh adha adhd advb aede aeva ahab ahad ahah ahed ahha ahva avab avda avea aveh avva baaa baad baah baba babb babe bada badb badd bade badh baed baha bava bave bbad bbbb bbdd bbeb bdav bddh bead beah beav beba bebb bebe beda bede beeb beed daab daad daae daba dabb dada dade daeb daha dahe dava dave dddd dead deae deba debe deda dedd dede deeb deed deev deha deva deve dhaa dhad dhed dhee dvda eaba eabh eada eadb eadd eave ebba ebed edad edah edda edde ede- edea edeh edve eede eeea eeee eeva ehaa ehav ehdd ehea eheh evae evah evdb evea haab haad haba habe hada hade hadh haed haha hava have hdda head heah hebb hebe heda hedd hede heeb heed hehe heve hhaa hhhh vaad vada vade vahe vava veba veda vede veve vhhh vvvv