diff --git a/src/main.ts b/src/main.ts
index e46ec7c..bd759cc 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -31,8 +31,8 @@ import {ChatGpt} from "./chat-gpt";
 import {Feedback} from "./feedback";
 import {Titled} from "./titled";
 import {Excluded} from "./excluded";
-import {Ranged} from "./ranged";
-import {Blob} from "./blob";
+import {Puzzled} from "./puzzled";
+import {Pdd} from "./pdd";
 
 export let github: {
   context: {
@@ -99,21 +99,9 @@ async function run() {
           core.setFailed(reason);
           throw new Error(reason);
         }
-        // if (new Puzzled(body).value()) {
-        //   // run pdd.ts
-        // }
-        // const puzzle = new Ranged(
-        //   await new Blob(octokit).asText(),
-        //   "150-156"
-        // ).asText();
-        // console.log(puzzle);
-
-        const puzzle = new Ranged(
-          await new Blob(octokit).asText(),
-          "150-156"
-        ).asText();
-        console.log(puzzle);
-
+        if (new Puzzled(body).value()) {
+          await new Pdd(octokit).run();
+        }
         const openai = core.getInput("openai_token");
         if (openai) {
           const model = core.getInput("openai_model");
diff --git a/src/pdd.ts b/src/pdd.ts
new file mode 100644
index 0000000..3bf81da
--- /dev/null
+++ b/src/pdd.ts
@@ -0,0 +1,52 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2023-2024 Tracehub.git
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import {Ranged} from "./ranged";
+import {Blob} from "./blob";
+import {Octokit} from "@octokit/rest";
+
+/**
+ * PDD routine.
+ */
+export class Pdd {
+
+  /**
+   * Ctor.
+   * @param github GitHub
+   */
+  constructor(private readonly github: Octokit) {
+  }
+
+  /**
+   * Run it.
+   */
+  async run() {
+    const puzzle = new Ranged(
+      await new Blob(this.github).asText(), // async -> await
+      "150-156" // from parsed link
+      // /https://github.com/tracehubpm/tracehub/blob/8d2aca048e33a5c9d83a49af4246c9ad7fde9998/src/main/java/git/tracehub/tk/TkGitHub.java#L150-L156
+    ).asText();
+    console.log(puzzle);
+  }
+}
diff --git a/src/puzzled.ts b/src/puzzled.ts
new file mode 100644
index 0000000..54db591
--- /dev/null
+++ b/src/puzzled.ts
@@ -0,0 +1,45 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2023-2024 Tracehub.git
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/**
+ * Puzzled or not.
+ */
+export class Puzzled {
+
+  /**
+   * Ctor.
+   * @param report Bug report
+   */
+  constructor(private readonly report: string) {
+  }
+
+  /**
+   * Is it puzzled or not.
+   */
+  value(): boolean {
+    return new RegExp(
+      "The puzzle `*.+` from #\d+ has to be resolved*.+"
+    ).test(this.report);
+  }
+}