NOTE1: Make sure your code is in version control. So you can restore the code when you get the error result.

NOTE2: Only a few code blocks have been tested like the test case. Do not use it for whole file. Otherwise, you may encounter the following error.

1

2

3 (A)

4

5

TEST CASE:

1

    a//comment
    ab //comment
    abc    //comment

2,3

    a//comment
    ab
    abc    //comment

4,5

    a//comment
    ab
    abc    //       comment