# Write a Python program that opens a file and handles a FileNotFoundError exception if the file does not exist.

# Define open_file function to open files specified by user
def open_file(filename):
    # Try to open entered filename
    try:
        open(filename)
    except FileNotFoundError:
        # Handle expected FileNotFoundError and print error message
        print('That file cannot be found.')
    except PermissionError:
        # Handle PermissionError exception for file existing in directory used in problem-05.py
        print('Insufficient permission to open file')

#Prompt user to enter a file name to be opened
open_file(filename = input('Enter the name of the file to open: '))