Below, you can find another hint for the Challenge.
You should only get here after reading, digesting, and applying the .
If you pursued the first suggestion, to use a quote marker next to the newline maker, then you probably ran into a little (nasty) surprise.
Here is a program fragment for marker processing, which you might get by using a backquote ` as quote marker (the backquote is not used for other purposes):
All that remains to be done is incorporating this into the full program, not forgetting to put it inside the string literal as well. The latter involves putting in both newline makers and quote markers in appropriate places.
So, let's do it:
While doing this, you might have gotten a weird feeling (where?). This is the program's outputs ():
Look at it carefully and find out what went wrong, and why. (The Challenge button in the machine can help you.)
Can you repair this?
Try your program in the machine, and see if you can extend it to a complete solution.
It is your turn ...
If you tried this hint, or do not see how it helps, then you are ready for the .