Envío 5579

Código

let readline = require("readline");

let LetterLog = [];
process.stdin.setEncoding("utf8");
let stdin = readline.createInterface({
  input: process.stdin,
  terminal: false,
});

stdin.on("line", readLine);

function readLine(line) {
  let wordLetters = [...line];
  let wordLength = wordLetters.length;

  for (let letter = 0; letter < wordLength; letter++) {
    let currentLetter = wordLetters[letter]
    let isIncluded = LetterLog.includes(currentLetter)

    if (isIncluded) {
      return console.log("yes");
    } if (letter === wordLength - 1) {
        console.log("no");
    } else {
        LetterLog.push(currentLetter)
    }

  }
}