如果语句返回错误的值

Question

import time
print("Welcome My Fellow Friend")
print("You have £5000")
rs = input("Would you like to buy a Ford Focus RS?")
if rs ==  "yes":
  print("You Have Bought The Ford Focus RS BALANCE = £0.00")
elif rs == "no":
  print("ok")

  

好的问题是，当我输入yes时它会返回你已经买了福特福克斯RS BALANCE =£0.00但是当我放弃它它会返回相同的东西！

谢谢！