public static void main(String[] args) {
		boolean check;
		long i = 21;
		while(true)
		{
			check = true;
			for(int j = 1; j < 21; j++)
			{
				if(i % j != 0)
					check = false;
			}
			if(check)
			{
				System.out.println(i);
				break;
			}		
			i++;
		}
	}