add Try section to recently updated README.md files

2019/ciura/README.md

@@ -9,6 +9,10 @@ Twitter: @mciura
 
 ### To run
 
+    ./getwords.sh en | grep .. | ./prog string
+
+### Try:
+
     ./getwords.sh en | grep .. | ./prog aeiouvwxyz
 
     ./getwords.sh en | grep .. | ./prog aeiouhjklmnvwxyz

2019/duble/README.md

@@ -10,6 +10,10 @@ Twitter: @etienne_duble
 
 ### To run
 
+    ./prog file
+
+### Try:
+
     ./prog /tmp/drawing
 
     (open another window / terminal)

2019/karns/README.md

@@ -11,6 +11,8 @@ Twitter: @jkarnss
 
     ./prog < textfile_that_fits_on_the_screen
 
+### Try:
+
     make test
 
     ./prog < README.md