Cows and Bulls Guessing Game

from random import randrange
from time import sleep


def cows_and_bulls_game_2():
    a = randrange(1, 9)
    b = randrange(1, 9)
    c = randrange(1, 9)
    d = randrange(1, 9)
    print("This program runs the cows ands bulls game where a four-digit number is generated every time you play.")
    sleep(5)
    print("After the program generates a random four-digit number you have to guess what that number is.")
    sleep(4.8)
    print("For every correct digit you guess in the correct place, you get a cow, if you guess wrong, you get a bull.")
    sleep(5.2)
    print("At the end of the game the program will print how many cows and bulls you have.")
    sleep(4)
    string = str(a) + "" + str(b) + "" + str(c) + "" + str(d) + ""
    user_guess = raw_input("Enter your guess over here: ")
    count_cows = 0
    count_bulls = 0
    if str(user_guess)[0] == str(a):
        count_cows = count_cows+1
    if str(user_guess)[0] != str(a):
        count_bulls = count_bulls+1
    if str(user_guess)[1] == str(b):
        count_cows = count_cows+1
    if str(user_guess)[1] != str(b):
        count_bulls = count_bulls+1
    if str(user_guess)[2] == str(c):
        count_cows = count_cows+1
    if str(user_guess)[2] != str(c):
        count_bulls = count_bulls+1
    if str(user_guess)[3] == str(d):
        count_cows = count_cows+1
    if str(user_guess)[3] != str(d):
        count_bulls = count_bulls+1
    print("The number is: " + str(string))
    print(str(count_cows) + " cows" + ", " + str(count_bulls) + " bulls")
    choice = raw_input("If you want to play again type continue over here, if not type exit: ")
    if choice == 'continue':
        def cows_and_bulls_game():
            a_2 = randrange(1, 9)
            b_2 = randrange(1, 9)
            c_2 = randrange(1, 9)
            d_2 = randrange(1, 9)
            string_2 = str(a_2) + "" + str(b_2) + "" + str(c_2) + "" + str(d_2) + ""
            user_guess_2 = raw_input("Enter your guess over here: ")
            count_cows_2 = 0
            count_bulls_2 = 0
            if str(user_guess_2)[0] == str(a_2):
                count_cows_2 = count_cows_2 + 1
            if str(user_guess_2)[0] != str(a_2):
                count_bulls_2 = count_bulls_2 + 1
            if str(user_guess_2)[1] == str(b_2):
                count_cows_2 = count_cows_2 + 1
            if str(user_guess_2)[1] != str(b_2):
                count_bulls_2 = count_bulls_2 + 1
            if str(user_guess_2)[2] == str(c_2):
                count_cows_2 = count_cows_2 + 1
            if str(user_guess_2)[2] != str(c_2):
                count_bulls_2 = count_bulls_2 + 1
            if str(user_guess_2)[3] == str(d_2):
                count_cows_2 = count_cows_2 + 1
            if str(user_guess_2)[3] != str(d_2):
                count_bulls_2 = count_bulls_2 + 1
            print("The number is: " + str(string_2))
            print(str(count_cows_2) + " cows" + ", " + str(count_bulls_2) + " bulls")
            choice_2 = raw_input("If you want to play again type continue over here, if not type exit: ")
            if choice_2 == 'continue':
                cows_and_bulls_game()
            if choice_2 == 'exit':
                return
            else:
                print("You have not entered a valid choice so we will end the game.")
                return

        cows_and_bulls_game()

    if choice == 'exit':
        return
    else:
        print("You have not entered a valid choice so we will end the game.")
        return


cows_and_bulls_game_2()