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: ['3223', 'h', 'w', 'f', 'y', '1667', '8843', '8759', '9203', '3305', '3549', '5507', '6251', 't', '8319', '9121', '6643', 'u', '4273', '4429', '7543', '7909', '789', '9183', '5729', 'd', '7063', 'b', '6677', 'w', 'x', 'x', 'z', '769', 'p', 'd', 'h']

Output: b, d, f, h, p, t, u, w, x, y, z


Input: Consider Input: ['r', '9489', 'e', 'n', '6323', 'd', '3163', '265', '8587', '7891']

Output: d, e, n, r


Input: Consider Input: ['8169', 'b', 'f', 'n', 'j', 'q', 'l', '5921', 'z', 'w', 'c', 'm', '2403', 'z', 'l', '7167', 'o', '8611', 'q', 'i', '2769', '5371']


Output: b, c, f, i, j, l, m, n, o, q, w, z