In this task, you are given an input list A comprising of numbers and alphabets. You need to extract and sort the unique alphabets in the list. The alphabets in the input list will only be in lowercase. Return -1 if there is no alphabet in the input list.

Example Input: ['459', '1729', 'b', 'c', '9619', '4461', '4347', '6733', 'i', '3631', 's', 'j', 'i', 'r', '5293', 'q', '7397', '4309', 'c', 'n', 'k', '197', 'q', '8139']
Example Output: b, c, i, j, k, n, q, r, s

Example Input: ['8527', 'p', '4697', '8415', 'v', 'l', '2669', '2649', '4349', '4201', 'r', '7573', '2041', 'f', '8047', 'u', 'm', 'm', 'j', '5695']
Example Output: f, j, l, m, p, r, u, v

Example Input: ['f', 'r', 's', '269', '4933', 'z', 'f', '3631', 's', '6723', 'l', '8909', '5493', 'z', '6227', '8039', 'd', 'm', 'w', 'p', 'l', 'c', '3293']
Example Output:
c, d, f, l, m, p, r, s, w, z