# Simple Contact Book

contact_book = {}

contact_book["John Doe"] = {"phone": "1234567890", "email": "johndoe@example.com"}
contact_book["Panos Fitsilis"] = {"phone": "1234567890", "email": "PanosFitsilis@example.com"}


if "Panos Fitsilis" in contact_book:
    del contact_book["Panos Fitsilis"]

if "John Doe" in contact_book:
    contact_book["John Doe"] = {"phone": "0987654321", "email": "john@example.com"}

contact_book.get("John Doe", "Contact not found")

for name, details in contact_book.items():
    print(f"Name: {name}, Phone: {details['phone']}, Email: {details['email']}")