Let's make 'hit and blow' game.

import random

def randomNumber():
    return random.randint(1000, 9999)
    
def check(guess, correct):
    hit = 0
    blow = 0
    correctList = list(correct)
    guessList = list(guess)
    for i in range(len(correctList)):
        if correctList[i] == guessList[i]:
            hit += 1
            correctList[i] = ' '
            guessList[i] = ' '
    for i in range(len(correctList)):
        for j in range(len(guessList)):
            if correctList[i] == guessList[j]:
                blow += 1
                correctList[i] = ' '
                guessList[j] = ' '
    return hit, blow

def main():
    correct = randomNumber()
    while(True):
        guess = input('your guess: ')
        hit, blow = check(guess, correct)
        if hit == 4:
            print('You WON!')
            break
        print