function main(n) {

    for (let i = n - 1; i > 0; i--) {
        let startResult = " "
        startResult += (" ").repeat(i);
        startResult += "* ".repeat(n - i)
        console.log(startResult);
    }


    for (let i = 0; i < n; i++) {
        let startResult = " "
        startResult += (" ").repeat(i);
        startResult += "* ".repeat(n - i)
        console.log(startResult);
    }



}