diff --git a/package.json b/package.json
index 5dd8d9200..30e7e6a1f 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,8 @@
 		"watch": "nodemon --watch src src/ValidateJson.ts",
 		"start": "ts-node src/ValidateJson.ts",
 		"normalize-structure-mask": "ts-node src/Normalize.ts",
-		"print-line-numbers": "ts-node src/LineNumbers.ts"
+		"print-line-numbers": "ts-node src/LineNumbers.ts",
+		"print-rooms": "ts-node src/RoomsPrinter.ts"
 	},
 	"repository": {
 		"type": "git",
diff --git a/src/RoomsPrinter.ts b/src/RoomsPrinter.ts
new file mode 100644
index 000000000..77dd1e641
--- /dev/null
+++ b/src/RoomsPrinter.ts
@@ -0,0 +1,35 @@
+import { FileHelper } from "./FileHelper";
+import { Dungeon } from './ValidateDungeons';
+import { StructurMaskUtils, StructureMaskLineNumbers } from './StructurMaskUtils';
+
+
+const maskStr = FileHelper.getFile('./contribution/dungeon/layout/structure-mask.json');
+const mask: { rooms: Dungeon[], bossRooms: Dungeon[] } = JSON.parse(maskStr);
+const structureMaskLineNumbers: StructureMaskLineNumbers = StructurMaskUtils.getStructureMaskLineNumbers(maskStr);
+
+console.log("=== ROOMS ===");
+console.log("");
+for (let i = 0; i < mask.rooms.length; ++i) {
+    console.log(`=== ROOM ${i} at line ${structureMaskLineNumbers.rooms[i]}`);
+    console.log("");
+    console.log(dungeonToString(mask.rooms[i]));
+    console.log("");
+    console.log("");
+}
+
+
+console.log("=== BOSS ROOMS ===");
+console.log("");
+for (let i = 0; i < mask.bossRooms.length; ++i) {
+    console.log(`=== ROOM ${i} at line ${structureMaskLineNumbers.bossRooms[i]}`);
+    console.log("");
+    console.log(dungeonToString(mask.bossRooms[i]));
+    console.log("");
+    console.log("");
+}
+
+function dungeonToString(room: Dungeon): string {
+    const partSize = room.tiles[0].length + 1;
+    const lines = StructurMaskUtils.chunkString(room.tiles.join(' '), partSize * 15);
+    return lines.join('\n');
+}
\ No newline at end of file
diff --git a/src/ValidateJson.ts b/src/ValidateJson.ts
index 33d960da6..452b575c8 100644
--- a/src/ValidateJson.ts
+++ b/src/ValidateJson.ts
@@ -49,9 +49,9 @@ function printDungeonErrorInfo(e: ErrorRoom, type: string, lineNumbers: number[]
   console.log('');
 }
 function dungeonToString(errorRoom: ErrorRoom): string {
-  const preparedArray = errorRoom.dungeon.tiles.map(s => `"${s}"`);
-  const partSize = preparedArray[0].length + 1;
-  const lines = StructurMaskUtils.chunkString(preparedArray.join(','), partSize * 15);
+  const room = errorRoom.dungeon;
+  const partSize = room.tiles[0].length + 1;
+  const lines = StructurMaskUtils.chunkString(room.tiles.join(' '), partSize * 15);
   return lines.join('\n');
 }
 ValidateLoreNote.start();
\ No newline at end of file