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', 'g', '9019', '9987', '8713', '9513', 'a', '2043', 'd', '5817', 'w', 'd']
Example Output: a, d, g, w

Example Input: ['8527', 'p', '4697', '8415', 'v', 'l', '2669', '2649', '4349', '4201', 'r', '7573', '2041', 'f', '8047', 'u', 'm', 'm', 'j', '5695']
Example Output: f, j, l, m, p, r, u, v

Example Input: ['h', '8125', 'b', '95', '6241', '9223', 'p', 'f', '109', '8473', '5351', '5131', 'r', '4709', 'c', '8385']
Example Output:
b, c, f, h, p, r