a-a a-b a-q aaa aab aad aae aaq ab- aba abb abd abe abq ad- ada adb add ade adq aea aeb aed aee aeq aqa baa bab bad bae baq bba bbb bbd bbe bbq bda bdb bdd bde bdq be- bea beb bed bee beq bqd bqe daa dab dad dae daq dba dbb dbd dbe dbq dda ddb ddd dde ddq de- dea deb ded dee deq dqa dqe eaa eab ead eae eba ebb ebd ebe ebq ed- eda edb edd ede eea eeb eed eee eqa eqe eqq qaa qad qba qbd qbe qbq qda qdb qed qee qqq