You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
def checkStability(input_string):
    # Initializing variable to 0
    stability_level = 0

    # Counting vowels
    vowels_count = 0 
    vowel_list = ['a','e','i','o','u']
    for i in input_string: 
        if i in vowel_list:
            vowels_count += 1

    # Calculating stability
    stability_level = vowels_count / len(input_string)

    # Printing out the stability
    print("Stability of string '%s' = %.2f" %(input_string,stability_level)) 

input_string = "This is a test sentence!" 
checkStability(input_string)
user
Stability of string 'This is a test sentence!' = 0.29
assistant