diff --git a/exercises/hamming/canonical-data.json b/exercises/hamming/canonical-data.json
index 986544cf67..4114bead17 100644
--- a/exercises/hamming/canonical-data.json
+++ b/exercises/hamming/canonical-data.json
@@ -1,6 +1,6 @@
 {
 "exercise": "hamming",
-"version": "2.1.1",
+"version": "2.2.0",
   "comments": [
     "Language implementations vary on the issue of unequal length strands.",
     "A language may elect to simplify this task by only presenting equal",
@@ -21,7 +21,7 @@
       "expected": 0
     },
     {
-      "description": "identical strands",
+      "description": "single letter identical strands",
       "property": "distance",
       "input": {
         "strand1": "A",
@@ -30,97 +30,25 @@
       "expected": 0
     },
     {
-      "description": "long identical strands",
-      "property": "distance",
-      "input": {
-        "strand1": "GGACTGA",
-        "strand2": "GGACTGA"
-      },
-      "expected": 0
-    },
-    {
-      "description": "complete distance in single nucleotide strands",
-      "property": "distance",
-      "input": {
-        "strand1": "A",
-        "strand2": "G"
-      },
-      "expected": 1
-    },
-    {
-      "description": "complete distance in small strands",
-      "property": "distance",
-      "input": {
-        "strand1": "AG",
-        "strand2": "CT"
-      },
-      "expected": 2
-    },
-    {
-      "description": "small distance in small strands",
-      "property": "distance",
-      "input": {
-        "strand1": "AT",
-        "strand2": "CT"
-      },
-      "expected": 1
-    },
-    {
-      "description": "small distance",
+      "description": "single letter different strands",
       "property": "distance",
       "input": {
-        "strand1": "GGACG",
-        "strand2": "GGTCG"
+        "strand1": "G",
+        "strand2": "T"
       },
       "expected": 1
     },
     {
-      "description": "small distance in long strands",
-      "property": "distance",
-      "input": {
-        "strand1": "ACCAGGG",
-        "strand2": "ACTATGG"
-      },
-      "expected": 2
-    },
-    {
-      "description": "non-unique character in first strand",
-      "property": "distance",
-      "input": {
-        "strand1": "AAG",
-        "strand2": "AAA"
-      },
-      "expected": 1
-    },
-    {
-      "description": "non-unique character in second strand",
-      "property": "distance",
-      "input": {
-        "strand1": "AAA",
-        "strand2": "AAG"
-      },
-      "expected": 1
-    },
-    {
-      "description": "same nucleotides in different positions",
-      "property": "distance",
-      "input": {
-        "strand1": "TAG",
-        "strand2": "GAT"
-      },
-      "expected": 2
-    },
-    {
-      "description": "large distance",
+      "description": "long identical strands",
       "property": "distance",
       "input": {
-        "strand1": "GATACA",
-        "strand2": "GCATAA"
+        "strand1": "GGACTGAAATCTG",
+        "strand2": "GGACTGAAATCTG"
       },
-      "expected": 4
+      "expected": 0
     },
     {
-      "description": "large distance in off-by-one strand",
+      "description": "long different strands",
       "property": "distance",
       "input": {
         "strand1": "GGACGGATTCTG",