strip first occurence of substring python

>>>mystring = "Description: Mary had a little lamb Description: "
>>>print mystring.replace("Description: ","",1)

"Mary had a little lamb Description: "

Here is what the above code is Doing:
1. We create a string variable called mystring.
2. We print mystring, which contains the text “Description: Mary had a little lamb Description: “.
3. We use the replace() method to replace the first instance of “Description: ” with an empty string.
4. We print mystring again, which now contains the text “Mary had a little lamb Description: “.

Instructions
1.
On line 3, print mystring.replace(“Description: “, “”, 1).

2.
On line 4, print mystring.replace(“Description: “, “”, 2).

3.
On line 5, print mystring.replace(“Description: “, “”, 3).

4.
On line 6, print mystring.replace(“Description: “, “”, 4).

5.
On line 7, print mystring.replace(“Description: “, “”, 5).

6.
On line 8, print mystring.replace(“Description: “, “”, 6).

7.
On line 9, print mystring.replace(“Description: “, “”, 7).

8.
On line 10, print mystring.replace(“Description: “, “”, 8).

9.
On line 11, print mystring.replace(“Description: “, “”, 9).

10.
On line 12, print mystring.replace(“Description: “, “”, 10).

11.
On line 13, print mystring.replace(“Description: “, “”, 11).

12.
On line 14, print mystring.replace(“Description: “, “”, 12).

13.
On line 15, print mystring.replace(“Description: “, “”, 13).

14.
On line 16, print mystring.replace(“Description: “, “”, 14).

15.
On line 17, print mystring.replace(“Description: “, “”, 15).

16.
On line 18, print mystring.replace(“Description: “, “”, 16).

17.
On line 19, print mystring.replace(“Description: “, “”, 17).

18.
On line 20, print mystring.replace(“Description: “, “”, 18).

19.
On line 21, print mystring.replace(“Description: “, “”, 19).

20.
On line 22, print mystring.replace(“Description: “, “”, 20).

21.
On line 23, print mystring.replace(“Description: “, “”, 21).

22.
On line 24, print mystring.replace(“Description: “, “”, 22).

23.
On line 25, print mystring.replace(“Description: “, “”, 23).

24.
On line 26, print mystring.replace(“Description: “, “”, 24).

25.
On line 27, print mystring.replace(“Description: “, “”, 25).

26.
On line 28, print mystring.replace(“Description: “, “”, 26).

27.
On line 29, print mystring.replace(“Description: “, “”, 27).

28.
On line 30, print mystring.replace(“Description: “, “”, 28).

29.
On line 31, print mystring.replace(“Description: “, “”, 29).

30.
On line 32, print mystring.replace(“Description: “, “”, 30).

31.
On line 33, print mystring.replace(“Description: “, “”, 31).

32.
On line 34, print mystring.replace(“Description: “, “”, 32).

33.
On line 35, print mystring.replace(“Description: “, “”, 33).

34.
On line 36, print mystring.replace(“Description: “, “”, 34).

35.
On line 37, print mystring.replace(“Description: “, “”, 35).

36.
On line 38, print mystring.replace(“Description: “, “”, 36).

37.
On line 39, print mystring.replace(“Description: “, “”, 37).

38.
On line 40, print mystring.replace(“Description: “, “”, 38).

39.
On line 41, print mystring.replace(“Description: “, “”, 39).

40.
On line 42, print mystring.replace(“Description: “, “”, 40).

41.
On line 43, print mystring.replace(“Description: “, “”, 41).

42.
On line 44, print mystring.replace(“Description