https://programmers.co.kr/learn/courses/30/lessons/12969?language=javascript
process.stdin.setEncoding('utf8');
process.stdin.on('data', data => {
const n = data.split(" ");
const a = Number(n[0]), b = Number(n[1]);
const row = '*'.repeat(a);
for (let i = 0; i < b; i++) {
console.log(row);
}
});