public class Solution {
    public static String[] addBorder(String[] picture) {
        int width = picture[0].length() + 2;
        String border = "*".repeat(width);

        String[] result = new String[picture.length + 2];
        result[0] = border;
        for (int i = 0; i < picture.length; i++) {
            result[i + 1] = "*" + picture[i] + "*";
        }
        result[result.length - 1] = border;

        return result;
    }
}