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: ['u', '1343', 'd', 'c', '9567', 'e', 'd', 'y', 's', '4199', '3217', '2937', '9345', 'd', 'l', '9875', '5987', 'p', '2585', '5843', '9643', '2423', 'e', 'l', 's', '3503', 'b', 'w', '9685', 'p', '6055', 'k', 'e', 'e', 't', '865', '6071', 'j', '3439', 't']

Output: b, c, d, e, j, k, l, p, s, t, u, w, y


Input: Consider Input: ['p', 'v', '1099', 'y', '1313', 's', '181', 'u', 'e', 'u', '8435', '4125', '8661', 'c', '4605', 'f', 'x']

Output: c, e, f, p, s, u, v, x, y


Input: Consider Input: ['m', 'l', 's', 'r', '1867', '9839', '2793', 'q', '5023', '2243', 'k', '627', 'n', 'd', '8091', '6835', '8971', '7779', 'l', 'y', '8257', '6779', '9683', '3849', '9219', '9407', '8647', 't', '7245', 'm', 'r', 'd', '5071', 'g', 'e', 'j', 'n', '3741', '7229', 'g', 'm']


Output: d, e, g, j, k, l, m, n, q, r, s, t, y