Envío 6304

Código

var readline = require('readline');

var rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});

rl.on("line", function (line) {
    const wordArray = line.split('');
    let result = 'no';

    for (let i = 0; i < wordArray.length; i++) {
        const curr = wordArray[i];
        const restOfWord = wordArray.slice(i + 1);
        if (restOfWord.includes(curr)) {
            result = 'yes';
            break;
        }
    }

    console.log(result);
});