. is the key in this challenge.
You should put the dot on the right position.
Solution 1 (Click to Show/Hide)
let exampleStr = "Let's have fun with regular expressions!"; let unRegex = /.un/; // Change this line let result = unRegex.test(exampleStr);
. will be any one character so the strings “run”, “sun”, “fun” and “pun” have the same un charaters.