Ytukyg

My task is to prompt a user for a string to decode, and a plain-text word that appears in the decoded string. The output should be the key needed to decode the string and the decoded string itself.

An example:
If the encoded string is: khoor zruog and the plain-text word is: hello
The program should work out the rotation was 3 and the decoded string is 'hello world'

I have defined a function key(shift), this allows me to call the function by doing key(3) for example. If I enter "khoor zruog" in the prompt I get "hello world"

def key(shift):

    data = 

    string = input("Please enter the string you wish to decode.n")

    for i in string:

        if i.strip() and i in ALPHABET:

            data.append(ALPHABET[(ALPHABET.index(i) - shift) % 26])

        else:

            data.append(i)

    output = ''.join(data)

    return (output)



def run():

    shift = 1

    for shift in range (26):

        if key(shift) == "hello world":

            print("hi")

        else:

            shift +=1

I am trying to figure out how to call my function key and increment it every time until it becomes hello world. So for example, it would first do key(1) then key(2) until it becomes "hello world" then stop.