public class TriangleUtilities {

    public static String getRow(int numberOfStars) {
        String result = "";
        for (int i=1;i<=numberOfStars;i++){
            result+="*" ;
        }
        return result;
    }
    
    public static String getTriangle(int numberOfRows) {
        String result = "";
        for (int i=1;i<=numberOfRows;i++){
            for (int j=1;j<=i;j++){
                result+= "*";
            }
            result+="\n" ;
        }
        return result;
    }


    public static String getSmallTriangle() {
        String result = "";
        for (int i=1;i<=4;i++){
            
            for (int j=1;j<=i;j++){
                result += "*" ;
            }
            result += "\n";
        }
        return result;
    }

    public static String getLargeTriangle() {
        String result = "";
        for (int i=1;i<=9;i++){
            for (int j=1;j<=i;j++){
                result += "*";
            }
            result += "\n";
        }
        return result;
    }
}