Learn גמרא דף יט. “וביניהן במלוא שתי רבקות (two dots – three lines from the bottom of the Amud) until דף יט: “ארי”ך (two dots – begining of the wide lines)
Continue learning the גמרא דף יט: בעא מיניה אביי מרבה
Question:
What is the safek of Abeye?
What is the difference how one reduces the size of the opening whether through דיומדין or פשוטין?
Learn Rashi well
Learn ריטב”א who asks question on Rashi and offers a different explanation
Learn ח’ ר”ן
Learn ח’ מהר”ל for a third explanation of the Gemara