public class TriangleUtilities {

    public static String getRow(int numberOfStars) {
        StringBuilder row = new StringBuilder("");
        for (int starsToPrint = 0; starsToPrint < numberOfStars; starsToPrint++) {
            row.append("*");
        }
        return row.toString();
    }
    
    public static String getTriangle(int numberOfRows) {
        StringBuilder triangle = new  StringBuilder("");
        for (int stars = 1; stars <= numberOfRows; stars++) {
           triangle.append(getRow(stars));
           triangle.append("\n");
        }
        return triangle.toString();
    }


    public static String getSmallTriangle() {
        return getTriangle(4);
    }

    public static String getLargeTriangle() {
        return getTriangle(9);
    }
}