//PROGRAM 4-31
class DemoDoWhileBersarang {	
  public static void main(String[] args) {		
    
    int i=1, j;
    do {
    	j=1;
    	do {
       System.out.print(i*j + " ");
       j++;
    	} while (j<=i);   	
    	System.out.println();
    	i++;
    } while (i<=5);
  }
}