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: ['d', 'o', '7643', '9065']
Example Output: d, o

Example Input: ['4397', '2685', '9539', '4343', '6697', '7693', 'g', 'c', '3587', '4691', 'j', '8931', '7397', '2103', '3431', 'u', 'l', 's', 'v', 'q', 'd', '1289', 'h', '1695', 'h', 'j', 'e', '1225', 'e', '7893', 'o', 'i', '3351']
Example Output: c, d, e, g, h, i, j, l, o, q, s, u, v

Example Input: ['3367', '4903', '3835', '6701', 'l', '8091', 'e', '2681', 'h', '789', '6285', '5909', '2135', '6357', 'y']
Example Output:
e, h, l, y