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: ['i', 'y', '8339', 'd', 'b', '7471', '6577', '9037', '4503', '6287', '1439', '8863', '9201', '2661', 'x', 'l', 'v', 'w', 'a', 'f', '8885', '519', '7631', 'g', '7203', '8605', '2429', '9165']
Example Output: a, b, d, f, g, i, l, v, w, x, y

Example Input: ['2741', '2541', '8943', 'l', '4047', '2211', 'p', 'e', 't', '7645', '9771', 'f', '5063', '2303', '6097', '5089', 'd', 'e', '1409', '3125', '2171', 'g', '1247', '4045', 'v', 'h', 'u', '2587', '5207', '5553', 'g', 'd', '6891', 'e', '2471', '2435']
Example Output: d, e, f, g, h, l, p, t, u, v

Example Input: ['4259', 'u', '1121', '5311', 'u', '9751', 'b', '7597', '3121', '8581', 'd', 'n', '6417', 'm', '7217', 'l', 'x', 'q', 's', '1083', 'o', '7897', 'c', '4547', 'm', '8821', '7823', 'e', 'c', 'h', 'p']
Example Output:
b, c, d, e, h, l, m, n, o, p, q, s, u, x