Add 1990/dg/try.sh

It runs the program with a couple strings and then it feeds the source
code to the program (piped to less) as well (after showing the source
code with less).

thanks-for-help.md

@@ -1024,6 +1024,8 @@ but later Cody added it back to make it more like the original).
 The second problem was suggested by the judges at the time of judging, to do
 with if the C preprocessor botches single quotes in cpp expansion.
 
+Cody also added the [try.sh](/1990/dg/try.sh) script.
+
 
 ## <a name="1990_jaw"></a>[1990/jaw](/1990/jaw/jaw.c) ([README.md](/1990/jaw/README.md]))