相关疑难解决方法(0)

我有一个if声明:

rules = input ("Would you like to read the instructions? ")
rulesa = "Yes"
if rules == rulesa:
    print  ("No cheating")
else: print ("Have fun!")

我希望用户能够回答Yes,YES,yES,yes或任何其他大小写,并且代码知道他们的意思是Yes.