input: Write a function to create a SQLite database with a contacts table and insert a contact.
  assert create_contacts_db_and_insert() == [('John', 'Doe', '1234567890', 'doe@example.com')]
output: def create_contacts_db_and_insert():
      import sqlite3
      
      conn = sqlite3.connect(':memory:')
      cursor = conn.cursor()
      
      cursor.execute('''
      CREATE TABLE contacts (
          first_name TEXT,
          last_name TEXT,
          phone TEXT,
          email TEXT
      )
      ''')
      
      cursor.execute('''
      INSERT INTO contacts (first_name, last_name, phone, email)
      VALUES (?, ?, ?, ?)
      ''', ('John', 'Doe', '1234567890', 'doe@example.com'))
      
      cursor.execute('SELECT * FROM contacts')
      result = cursor.fetchall()
      
      conn.close()
      return result