input: Develop a Python function to determine the highest possible number using the provided digits.
  assert generate_Max_Number([1,2,3],3) == 321
  assert generate_Max_Number([4,5,6,1],4) == 6541
  assert generate_Max_Number([1,2,3,9],4) == 9321
output:     numbers.sort(reverse=True)
      return int(''.join(map(str, numbers)))