import java.util.*;

public class TriangleUtilities {

    public static String getRow(int numberOfStars) {
        // Use StringBuilder and a loop
        
        StringBuilder stars = new StringBuilder();
        
        for (int i = 0; i < numberOfStars; i++) {
            stars.append("*"); 
        }
        
        String starTriangle = stars.toString();
        
        return starTriangle;
    }
    
    public static String getTriangle(int numberOfRows) {
        StringBuilder stars = new StringBuilder();
        
        for (int i = 1; i <= numberOfRows; i++) {
            for (int j = i; j > 0; j--) {
                stars.append("*");
            }
            stars.append("\n");
        }
        
        String starTriangle = stars.toString();
        return starTriangle;
        
    }


    public static String getSmallTriangle() {
        StringBuilder stars = new StringBuilder();
        
        for (int i = 1; i < 5; i++) {
            for (int j = i; j > 0; j--) {
                stars.append("*");
            }
            stars.append("\n");
        }
        
        String starTriangle = stars.toString();
        return starTriangle;

        }

    public static String getLargeTriangle() {
        StringBuilder stars = new StringBuilder();
        
        for (int i = 1; i < 10 ; i++) {
            for (int j = i; j > 0; j--) {
                stars.append("*");
            }
            stars.append("\n");
        }
        
        String starTriangle = stars.toString();
        return starTriangle;

    }
}