diff --git a/problems/LabZero_ChapterThree.h b/problems/LabZero_ChapterThree.h
index 7bc019436458605f4205ab9e6c7266709177929d..0e0d3f04b383398fe60e791599bb4fd6d4ccab65 100644
--- a/problems/LabZero_ChapterThree.h
+++ b/problems/LabZero_ChapterThree.h
@@ -17,7 +17,7 @@
 void labZero_pThree();
 
 /**
- * @input  read in four pairs of integral x y coordinates, one per line.
+ * @input  read in four pairs of integral x y coordinates, one per line, in clock-wise order
  * @output outputs the most specific description of the
  *    four points among the following choices:
  *    square, rectangle, trapezoid, rhombus, none of these
@@ -25,15 +25,15 @@ void labZero_pThree();
  * @example 1
  * 0 0
  * 0 1
- * 1 0
  * 1 1
+ * 1 0
  * square
  *
  * @example 2
  * 0 0
  * 0 1
- * 2 0
  * 1 1
+ * 2 0
  * trapezoid
  */
 void labZero_pFour();
diff --git a/tests/LabZero.cpp b/tests/LabZero.cpp
index 17ef9021886b901643b0f6abf60f0052a3e9216a..c9f7eef1a2f4365471978fad0051fd1972f84ca7 100644
--- a/tests/LabZero.cpp
+++ b/tests/LabZero.cpp
@@ -70,14 +70,14 @@ bool test_labZero_pFour() {
     string out;
 
     // example 1
-    Common::redirIO("0 0\n0 1\n1 0\n1 1\n");
+    Common::redirIO("0 0\n0 1\n1 1\n1 0\n");
     labZero_pFour();
     out = Common::restoreIO();
     if (out.find("square") == string::npos)
         return false;
 
     // example 2
-    Common::redirIO("0 0\n0 1\n2 0\n1 1\n");
+    Common::redirIO("0 0\n0 1\n1 1\n2 0\n");
     labZero_pFour();
     out = Common::restoreIO();
     if (out.find("trapezoid") == string::npos)