Guess program in python

 g = 5

while(g<6):
    print("Enter an Number to guess")
    num=int(input())

    g=g-1
    if num>18:
        print("Please try smaller value")

    elif num<18:
        print("Please try larger value")

    elif num==18:
        print("Yes!! Right Guess")
        break

    print("You have ",g,"guesses left")

    if g==0:
        print("Game Over!!")
        break