public String getBlks(int n){
    	if(n == 0) return "";
    	else if(n == 1) return " ";
    	else if(n == 2) return "  ";
    	else if(n == 3) return "   ";
    	else if(n == 4) return "    ";
    	else{
    		String s = "";
    		while(n > 0){
    			s += " ";
    			n--;
    		}
    		return s;
    	}
    }