const { workerData, parentPort } = require('worker_threads');

function isPrime(n) {
    // Corner case
    if (n <= 1)
        return false;

    // Check from 2 to n-1
    for (let i = 2; i < n; i++)
        if (n % i == 0)
            return false;

    return true;
}

const result = workerData.toUpperCase();

parentPort.postMessage(result);