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: ['6495', '2259', '8213', 'm', 'y', '3377', 'q', 'i', '1299', 's', 'w', '4331', 'h', '5459', '4059', '6637', '8069', '5367', '6025', 'l', 'v', '4503', 'd', 'x', 'w', '5067', '9019', 'd', '7919', '7299', 'v', '8957', 'v', '5341', '2617', '8169', 'n', 'y']

Output: d, h, i, l, m, n, q, s, v, w, x, y


Input: Consider Input: ['s', 'w', 'c', '4137', 't', '2437', '349', 'h', '4539', 't', 'b', 'y', 'q', 't', '9087', 'c', '9489', '6285', '6247', '8353', 'n', 't', '8661', 'p', 'z', 'p', '773', 'w', 'q', '8081', 'r', 'u', 'z', 'k', 'a', 'b', '7513', '5549', '5325', '1101', 's', '6507', '3317']

Output: a, b, c, h, k, n, p, q, r, s, t, u, w, y, z


Input: Consider Input: ['8143', 'u', '1015', '7419', '6571', 'a', '6147', 'y', '2507', '4689', 'z', 'i', '5899', '6589', 'l', 'j', '8329', 'b', '4289', 'a', '7865', '8183', '903', '491', 'b', '5195', 'd', '2303', '5239', 'j', 's']


Output: a, b, d, i, j, l, s, u, y, z