toy problem or water jug problem

print("Water jug problem")
x = int(input("Enter X : "))
y = int(input("Enter Y : "))
while True:
    rn = int(input("Enter the rule no. : "))    
    if rn == 2:
        if y < 3:
            x = 0
            y = 3
    if rn == 3:
        if x > 0: 
            x = 0
            y = 3
    if rn == 5:
        if x + y > 4: 
            x = 4
            y = y - (4 - x)
    if rn == 7:
        if x + y < 4: 
            x = x + y
            y = 0
    if rn == 9:
        x = 2
        y = 0   
    print("X=", x)
    print("Y=", y)
    if x == 2:
        print("The result is a goal state")
        break