Γεια σας! I wonder the verb βγαίνω in the Αόριστος of medio passive voice. Since πληρώνω becomes πληρώθηκα and αγοράζω becomes αγοράστικα, I tried some combinations like βγήκα and βγαίνω + steams -θηκ-, -φτηκ-, -φθηκ-, -(αυ/ευ)τηκ- and many others which are typical of the Αόριστος + ending -α) in some sites but I got no answer. If you are a native Greek, I tell you the more you want to teach (please!) the most I want you to write about it because I just love this beautiful language and I have tried to learn it as my second language. Some years later and I will be writing it all in Greek. Believe me! Ευχαριστώ!