diff --git a/bin/sort-practice-exercises b/bin/sort-practice-exercises
new file mode 100644
index 00000000..2ce7c227
--- /dev/null
+++ b/bin/sort-practice-exercises
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+die () { echo "$*" >&2; exit 1; }
+
+(( $# == 2 )) || die "Usage: $0 <comparison-type> <config.json>"
+[[ -r $2 ]] || die "$2 is not a readable file"
+
+tmp=$(mktemp)
+jq -r '
+  # Bucket by displayed difficulty. 0-3: easy; 4-7: medium; 8-10: hard.
+  def bucket(i): [1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3][i];
+  # Code injection to inject the sort literal expression.
+  def sort: sort_by('"$1"');
+  .exercises.practice = (
+    .exercises.practice |
+    # Add displayed difficulty
+    map(.lowercase_name = (.name | ascii_downcase)) |
+    map(.bucket = bucket(.difficulty)) |
+    # Leave hello-world at the top
+    if .[0].slug == "hello-world" then
+      [.[0]] + (.[1:] | sort)
+    else
+      sort
+    end |
+    map(del(.lowercase_name)) |
+    map(del(.bucket))
+  )
+' "$2" > "$tmp" && \
+cat "$tmp" > "$2"
+rm "$tmp"
diff --git a/config.json b/config.json
index e51f5ed1..4e6708dc 100644
--- a/config.json
+++ b/config.json
@@ -150,14 +150,6 @@
           "math"
         ]
       },
-      {
-        "slug": "dnd-character",
-        "name": "D&D Character",
-        "uuid": "eb38bf54-c597-4856-bf1d-3867d75ae586",
-        "practices": [],
-        "prerequisites": [],
-        "difficulty": 4
-      },
       {
         "slug": "eliuds-eggs",
         "name": "Eliud's Eggs",
@@ -188,17 +180,12 @@
         "difficulty": 2
       },
       {
-        "slug": "grains",
-        "name": "Grains",
-        "uuid": "99408193-d0ce-4c68-8cab-e680f3ed56a4",
+        "slug": "food-chain",
+        "name": "Food Chain",
+        "uuid": "adf3945f-6735-471c-b02b-b3dac0aab1bc",
         "practices": [],
         "prerequisites": [],
-        "difficulty": 5,
-        "topics": [
-          "math",
-          "strings",
-          "loops"
-        ]
+        "difficulty": 3
       },
       {
         "slug": "hello-world",
@@ -279,14 +266,6 @@
         "prerequisites": [],
         "difficulty": 2
       },
-      {
-        "slug": "luhn",
-        "name": "Luhn",
-        "uuid": "e2020329-442d-45da-ac89-ff15eade794e",
-        "practices": [],
-        "prerequisites": [],
-        "difficulty": 2
-      },
       {
         "slug": "list-ops",
         "name": "List Ops",
@@ -295,6 +274,14 @@
         "prerequisites": [],
         "difficulty": 3
       },
+      {
+        "slug": "luhn",
+        "name": "Luhn",
+        "uuid": "e2020329-442d-45da-ac89-ff15eade794e",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 2
+      },
       {
         "slug": "matrix",
         "name": "Matrix",
@@ -362,6 +349,14 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "protein-translation",
+        "name": "Protein Translation",
+        "uuid": "4d510ad3-4d37-491a-99c6-892fbe5bd095",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 3
+      },
       {
         "slug": "proverb",
         "name": "Proverb",
@@ -371,9 +366,9 @@
         "difficulty": 2
       },
       {
-        "slug": "protein-translation",
-        "name": "Protein Translation",
-        "uuid": "4d510ad3-4d37-491a-99c6-892fbe5bd095",
+        "slug": "queen-attack",
+        "name": "Queen Attack",
+        "uuid": "c728a685-1b4e-4d77-9273-6ee42ca4fb0e",
         "practices": [],
         "prerequisites": [],
         "difficulty": 3
@@ -431,14 +426,6 @@
         "prerequisites": [],
         "difficulty": 1
       },
-      {
-        "slug": "run-length-encoding",
-        "name": "Run-Length Encoding",
-        "uuid": "1024a826-2f71-4833-9e96-59e0b0156f26",
-        "practices": [],
-        "prerequisites": [],
-        "difficulty": 3
-      },
       {
         "slug": "robot-name",
         "name": "Robot Name",
@@ -475,6 +462,14 @@
         "prerequisites": [],
         "difficulty": 3
       },
+      {
+        "slug": "run-length-encoding",
+        "name": "Run-Length Encoding",
+        "uuid": "1024a826-2f71-4833-9e96-59e0b0156f26",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 3
+      },
       {
         "slug": "saddle-points",
         "name": "Saddle Points",
@@ -528,6 +523,14 @@
         "prerequisites": [],
         "difficulty": 3
       },
+      {
+        "slug": "square-root",
+        "name": "Square Root",
+        "uuid": "5dc9081a-e537-471f-800b-5b0e0aab3742",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 2
+      },
       {
         "slug": "state-of-tic-tac-toe",
         "name": "State of Tic-Tac-Toe",
@@ -544,14 +547,6 @@
         "prerequisites": [],
         "difficulty": 3
       },
-      {
-        "slug": "square-root",
-        "name": "Square Root",
-        "uuid": "5dc9081a-e537-471f-800b-5b0e0aab3742",
-        "practices": [],
-        "prerequisites": [],
-        "difficulty": 2
-      },
       {
         "slug": "sublist",
         "name": "Sublist",
@@ -605,14 +600,6 @@
         "prerequisites": [],
         "difficulty": 2
       },
-      {
-        "slug": "queen-attack",
-        "name": "Queen Attack",
-        "uuid": "c728a685-1b4e-4d77-9273-6ee42ca4fb0e",
-        "practices": [],
-        "prerequisites": [],
-        "difficulty": 3
-      },
       {
         "slug": "word-count",
         "name": "Word Count",
@@ -633,6 +620,14 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "all-your-base",
+        "name": "All Your Base",
+        "uuid": "a489b452-cf01-4670-bfe4-ccfeac57b466",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 5
+      },
       {
         "slug": "allergies",
         "name": "Allergies",
@@ -645,14 +640,6 @@
           "sorting"
         ]
       },
-      {
-        "slug": "all-your-base",
-        "name": "All Your Base",
-        "uuid": "a489b452-cf01-4670-bfe4-ccfeac57b466",
-        "practices": [],
-        "prerequisites": [],
-        "difficulty": 5
-      },
       {
         "slug": "anagram",
         "name": "Anagram",
@@ -699,6 +686,14 @@
         "prerequisites": [],
         "difficulty": 4
       },
+      {
+        "slug": "dnd-character",
+        "name": "D&D Character",
+        "uuid": "eb38bf54-c597-4856-bf1d-3867d75ae586",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
+      },
       {
         "slug": "diamond",
         "name": "Diamond",
@@ -723,6 +718,19 @@
         "prerequisites": [],
         "difficulty": 5
       },
+      {
+        "slug": "grains",
+        "name": "Grains",
+        "uuid": "99408193-d0ce-4c68-8cab-e680f3ed56a4",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 5,
+        "topics": [
+          "math",
+          "strings",
+          "loops"
+        ]
+      },
       {
         "slug": "hamming",
         "name": "Hamming",
@@ -845,14 +853,6 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 6
-      },
-      {
-        "slug": "food-chain",
-        "name": "Food Chain",
-        "uuid": "adf3945f-6735-471c-b02b-b3dac0aab1bc",
-        "practices": [],
-        "prerequisites": [],
-        "difficulty": 3
       }
     ],
     "foregone": [