Add missing sample to letter_pairs statement

iiliffe · web-flow · commit 0d73c7a57794 · 2022-11-11T17:24:29.000+11:00
diff --git a/data/course-revision/1511-22T3/letter_pairs.mdx b/data/course-revision/1511-22T3/letter_pairs.mdx
@@ -47,7 +47,7 @@ Input:
 ```bash:~/1511-revision/letter_pairs
 $ dcc letter_pairs.c -o letter_pairs
 $ ./letter_pairs
-
+balloon
 ```
 
 Output:
