To test the code:
http://codeforces.com/problemset/customtest (select Node.js)
To output:
console.log('your output text here');
To input:
let i = ''
process.stdin.on('data', c => i += c)
process.stdin.on('end', () => {
const {EOL} = require('os')
const lines = i.split(EOL) /*your input text, split by lines*/
console.log(lines);
})