03. Text Filter

using System;
using System.Linq;
using System.Text;
class TextFilter
{
    static void Main()
    {
        string[] word = Console.ReadLine().Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
        StringBuilder text = new StringBuilder(Console.ReadLine());
        string[] result = new string[word.Count()];

        for (int i = 0; i < word.Count(); i++)
        {
            result[i] = new string('*', word[i].Length);
            text.Replace(word[i], result[i]);
        }
        Console.WriteLine(text);
    }
}