1let strArray = ["aaa", "bbb", "aaa", "ccc", "ccc", "aaa"];
2function firstRepeatedWord(arr) {
3  let m = new Map();
4  for (let i = 0; i < arr.length; i++) {
5    if (m.get(arr[i])) {
6      return arr[i];
7    } else {
8      m.set(arr[i], true);
9    }
10  }
11  return "No repeated word";
12}
13
14console.log(firstRepeatedWord(strArray));