def classify_height(height_cm):
    if height_cm > 200:
        return "You're tall."
    elif height_cm <= 160:
        return "You're small."
    elif height_cm >= 170:
        return "You're normal."
    else:
        return "Height not classified."

# Example usage
height = float(input("Enter your height in cm: "))
print(classify_height(height))