input: Write a function to create a Flask application that allows users to submit a form with fields 'name', 'email', and 'phone' and stores the data in an SQLite database. If the form submission is successful, the user should be redirected to the home page.
  
  assert create_flask_app() == '''
  from flask import Flask, render_template, request, redirect
  import sqlite3
  
  app = Flask(__name__)
  
  @app.route('/')
  def home():
   return render_template('index.html')
  
  @app.route('/submit', methods=['POST'])
  def submit():
   name = request.form.get('name')
   email = request.form.get('email')
   phone = request.form.get('phone')
   
   conn = sqlite3.connect('data.db')
   cur = conn.cursor()
   
   cur.execute("INSERT INTO data (name, email, phone) VALUES (?, ?, ?)", (name, email, phone))
   conn.commit()
   
   return redirect('/')
  	
  if __name__ == '__main__':
   app.run(debug=True)
  '''
output: 
  from flask import Flask, render_template, request, redirect
  import sqlite3
  
  app = Flask(__name__)
  
  @app.route('/')
  def home():
   return render_template('index.html')
  
  @app.route('/submit', methods=['POST'])
  def submit():
   name = request.form.get('name')
   email = request.form.get('email')
   phone = request.form.get('phone')
   
   conn = sqlite3.connect('data.db')
   cur = conn.cursor()
   
   cur.execute("INSERT INTO data (name, email, phone) VALUES (?, ?, ?)", (name, email, phone))
   conn.commit()
   
   return redirect('/')
  