Add 1998/df/try.sh

This script runs repeatedly until (when prompted) one hits 'q' (or 'Q')
or else sends ctrl-c/intr. I also added a question to the extra credit
questions: are there any misspelt words and if there are what are they?
I also added that there's a way to cheat very easily but I did not say
how to do it. It should be pretty obvious how to do it to anyone who
tries the program once or if not once a few times.

1998/df/README.md

@@ -11,6 +11,19 @@ make all
 ./df
 ```
 
+
+## Try:
+
+```sh
+./try.sh
+```
+
+This will run the program in a loop until you exit (`q` when prompted or
+ctrl-c/intr).
+
+Can you figure out a very simple pipeline to cheat?
+
+
 ## Judges' remarks;
 
 Everyone talks about how data hiding can produce clearer code; I am
@@ -33,6 +46,7 @@ Extra credit questions:
 - Where are the words stored?
 - How many words does this entry use?
 - Can you add more words to the program and still make it work?
+- Are there any misspelt words? If yes what are they?
 
 
 ## Author's remarks: