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: ['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']

Output: c, d, g, h, j, m, n, p, q, u, v, y, z


Input: Consider Input: ['747', '5385', '5313', 'p', '9581', 'r', '1339', '3919', 'e', 'e', '8057', '7739', 'i', 'e', '3311', '963', 'g', 'h', '7349', 'y', '1493', 'e', '3055']

Output: e, g, h, i, p, r, y


Input: Consider Input: ['r', 'd', 'j', 'p', 'd', '2523', 'm', '7193', '2589', '7625', '8333', '3425', 'j', '1883', 'b', 'o', '385', 'd', '2791', 'y', 'a', '7071', 't', 'k', 'z', 's', '9553', '2687', '7665']


Output: a, b, d, j, k, m, o, p, r, s, t, y, z