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: ['1593', '8165', 'q', '6689', 'b', 'r', '373', 'g', '6505', '415', '495', 'j', 'j', 'f']

Output: b, f, g, j, q, r


Input: Consider Input: ['i', '1191', '5581', '2527', 'g', '9795', '519', 'u', '8389', '9793', 'k', '5733', '7125', '7835', 'j', '855', 'd', 'd', '6555', '3211', 'l', 'o', 'b', '523', 'x', 'j', '1707', '4161', '7171', 'h', 'h', 'm', 'h', '2443', 'e', '649', '951', 'n', 'h']

Output: b, d, e, g, h, i, j, k, l, m, n, o, u, x


Input: Consider Input: ['m', '1941', 'n', 'y', 'c', 'x', '6443', '1633', '5923', 'f', '3839', '8595', 'u', '1213', 'o', 'q', 'g', '1861', 'n', '6405', '3125', '5697', '9015', 'y', 'b', 'v', 'l', 'e', 'e', '6347', '3275', 't', '623', 'p', '4113', 'a', '2565', 'x', '7619', 'r', '2159', '2591', '4351', '6011', 'l']


Output: a, b, c, e, f, g, l, m, n, o, p, q, r, t, u, v, x, y