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: ['n', 'h', 'h', 'e', 'p', '1265', '4853', '9433', '1227', '1619', '6381', 'o', '8285', 'k', 'u', '7471', 'm', '6887', '6579', '5813', '5563', '8535', 'n', '3743', 'h', 't', '4497', '2791', 'e', 'v', '6769', '7969', 'x', 't', 'x', 'q']
Example Output: e, h, k, m, n, o, p, q, t, u, v, x

Example Input: ['9113', '3625', 'u', '8189', '3649', '259', '5539', '1583', 'g', '4037', 'y', 'v', '8337', 'd', 'q', 'j', 'c', 'h', 'p', '1601', 'z', 'c', 'n', '1767', '1679', '1805', 'm', '4469', '2487', '6015', '973']
Example Output: c, d, g, h, j, m, n, p, q, u, v, y, z

Example Input: ['t', 'e', 'e', 'i', 'j', '2705', '6121', 'm', '4599', 's', 'l', 'u', '6587', 'b', '281', '5895', 'c', 'q', 'j', 'z', '1707', '9527', '3581', '1171', '1543']
Example Output:
b, c, e, i, j, l, m, q, s, t, u, z