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: ['1223', 'h', 'a', 'o', 'v', '2535', 'g', '6267', 'w', '9625', '7961', '9577', '7611', '5655', 'p', 'j', 's', '2141', '4101', 'l', '4367', '9383', 'n', '5965', '9097', '7571', 'p', 'u', 'x']

Output: a, g, h, j, l, n, o, p, s, u, v, w, x


Input: Consider Input: ['o', 'c', '6469', 'x', '8815', '4441', '6193', 'u', 'm', 'a', '9879', 'p', '8335', 'c', 'z']

Output: a, c, m, o, p, u, x, z


Input: Consider Input: ['s', 'w', '5631', 'o', '4755', 'm', 'q', 'k', 'v', '9965', '323', '1039', 'f', 'm', 'u', '8199', 't', 'h', 'p', '8425', '9067', '5741', '2525', '7821', 't', '3911', 'd', 'r', 'e', 'z', '6199', 'o']


Output: d, e, f, h, k, m, o, p, q, r, s, t, u, v, w, z