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app/javascript/controllers/index.js

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+// This file is auto-generated by ./bin/rails stimulus:manifest:update
+// Run that command whenever you add a new controller or create them with
+// ./bin/rails generate stimulus controllerName
+
+import { application } from "./application"
+
+import HelloController from "./hello_controller"
+application.register("hello", HelloController)
+
+import ListingPuzzleController from "./listing_puzzle_controller"
+application.register("listing-puzzle", ListingPuzzleController)