[7,79,97,787,797,877,887,977,997,7789,7877,7879, 8779,8887,9787,9887,77797,77899,77977,77999,78779, 78787,78797,78877,78887,78889,78977,78979,78989, 79777,79889,79979,79987,79997,79999]