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.

Input: Consider Input: ['2705', 'n', 'r', '8259', '6839', '3239', 'w', 'z', '2611', '2957', '2303', '6315', '7801', 'c', 'w', 'm', '5049', '6465', '599', 'h', 'q', '7559', 'n', '9917', 'v', 'l', '643', '6415', '3587', 'c', '917', '4435', 'p', 'a', '317']

Output: a, c, h, l, m, n, p, q, r, v, w, z


Input: Consider Input: ['8301', 'd', 'p', 'l', 'm', '9099', 'o', '8045', 'e', 's', 't', '8853', 'v', '6375', 'q', '2505', 's', '4219', '3587', 'g', '651', '7129']

Output: d, e, g, l, m, o, p, q, s, t, v


Input: Consider Input: ['d', 'q', 'j', 'q', 'l', '941', 'h', 'v', '6351', '3789', 'v', '5161', '9995', '4437', 'o', '9301']


Output: d, h, j, l, o, q, v