public class TriangleUtilities {
    
    
    public static String getRow(int numberOfStars) {
        StringBuilder row = new StringBuilder();
        for (int i = 0; i < numberOfStars; i++){
            row = row.append('*');
        }
        System.out.println(row);
        return row.toString();
    }
    
    public static String getTriangle(int numberOfRows) {
        StringBuilder triangle = new StringBuilder();
        for (int i = 0; i < numberOfRows; i++) {
            String currRow = getRow(i + 1);
            triangle.append(currRow + "\n");
        }
        return triangle.toString();
    }


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

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