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: ['f', 'w', 'y', 't', '5269', '9989', 'p', 'v', '6609', 'v', 'c', 'q', 'm', '6565', '189', 'm', '3617', 'b', '9147', '665', 'v', '5989', '1511', '3123', '6667', '4661', '185', 'b', '3405', 'b', '6027', 'n', '6973', '505', 'g', '815', '3439', '2069', '291', 'j', 'f', '1121', '8009', 'm', '8353']
Example Output: b, c, f, g, j, m, n, p, q, t, v, w, y

Example Input: ['4743', '9687', '2887', '4413', 'r', 'w', '2355', 'l', 'd', '453', 'o', 'm', '4351', '5881', '3963', 'g', 'r', 'z', 'q', '7555', 'y', '9555', '405', 'n', 'l', '6733', '1763', 'v', '9925', 'y', '633', '827', 'w']
Example Output: d, g, l, m, n, o, q, r, v, w, y, z

Example Input: ['1751', 's', 'f', '4733', '3693', 'b', '9817', 'w', 'j', '9731', 'b', 'v', '3179', '8273', 'j', '3675', 's', '1819', 'y', '5749', 'e', '9399', '9339']
Example Output:
b, e, f, j, s, v, w, y