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.

Example Input: ['a', 'y', '7401', 'e', 'l', '4351', 'p', '5673', 'k', '333', 'o', 'd', 'e', 'j', 'e', '9569', '1795', 'r', 'z', '6059', '4399', '2927', 'n', '9387', '9317', 'b', 'c', 'e']
Example Output: a, b, c, d, e, j, k, l, n, o, p, r, y, z

Example Input: ['8357', 'x', 'w', '287', 'z', '2733', '1757', 'w', 'g', '1393', '7201', '4931', 'k', '5185', 'x', '6313', '2255', 'z', 'v', '3593', '6191', '4423', 'm', 'k', '3209', '3559', 'c', 'n', 'm', '5461', '2997', '235', '4045', '6597', 'v', 'e', 'p', 'c', 'k', 'd', '5529', '6241', 'u', 'f', '8067']
Example Output: c, d, e, f, g, k, m, n, p, u, v, w, x, z

Example Input: ['157', 'd', 'i', 'u', '4217', 'v', 'u', 'j', 'i', '6233', '4903', 'i', 'c', 't', '6401', 'c', 'd', '6439', '9409', 'g', 'w', 'l', '8893', 's', 'l', '2481', 'h', 'y', 'h', 'b', '6931', 'e', '9227', '3613', '571', '5447', '3513', 'f', '9171', '5921']
Example Output:
b, c, d, e, f, g, h, i, j, l, s, t, u, v, w, y