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Index() and in under the hood

Theory

Find the name

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Let's assume you have a list of numbers that you don't recognize. You don't know what these numbers are. You can try to find the numbers from the phone book. In the code section, ask a user for a number. If you find the number, print the owner's name. Otherwise, print Not found.

Sample Input 1: 

124-347

Sample Output 1: 

John

Sample Input 2: 

123-231

Sample Output 2: 

Not found
Write a program in Python 3
# the dictionary with the phone numbers and names, do not modify it
phone_dict = {"124-347": "John", "123-789": "Bob", "123-456": "Mary", "123-333": "Jack"}

# your code here
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