public class Star{

	public static void main(String [] args){
	
	
	System.out.println("\nPart a)");
	for(int i = 10; i > 0; i--){
		for(int j = 0; j < i; j++)
			System.out.print("*");
		
		System.out.println();
	}

	System.out.println("\nPart b)");	
	for(int i = 0; i < 10; i++){
	
		for(int j = 0; j< 10-i-1;  j++)
			System.out.print(" ");
	
		for(int j = 0; j <= i; j++)
			System.out.print("*");
		
		System.out.println();
	}
	
	System.out.println("\nPart c)");
	for(int i = 0; i < 10; i++){
	
		for(int k = 0; k < i ; k++)
			System.out.print(" ");
	
		for(int j = 0; j< 10-i; j++)
			System.out.print("*");
		
		System.out.println();
	}	
	

	
	System.out.println("\nPart d)");
	// First, print the top part
	for(int i = 0; i < 5; i++){
	
		for(int j = 0; j< 5-i-1;  j++)
			System.out.print(" ");
	
		for(int j = 0; j < 2*i+1; j++)
			System.out.print("*");
		
		System.out.println();
	}
	// Second, print the bottom part
	for(int i = 4; i >= 0; i--){
	
		for(int j = 0; j< 5-i-1;  j++)
			System.out.print(" ");
	
		for(int j = 0; j < 2*i+1; j++)
			System.out.print("*");
		
		System.out.println();
	}

	
	}

}