diff --git a/reverse-words-in-a-sentence.json b/reverse-words-in-a-sentence.json
new file mode 100644
index 0000000..5f76c8a
--- /dev/null
+++ b/reverse-words-in-a-sentence.json
@@ -0,0 +1,6 @@
+[
+  { "input": ["hello world"], "expected": "world hello" },
+  { "input": ["the sky is blue"], "expected": "blue is sky the" },
+  { "input": [""], "expected": "" },
+  { "input": ["a"], "expected": "a" }
+]