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: ['v', '3765', '4065', 'a', '4201', 'f', 'x', '9275', 'q', '9303']
Example Output: a, f, q, v, x

Example Input: ['5859', 'x', 'z', 'v', 'l', 'z', 'g', 't', 'x', '341', '7023', '4937', 'b', 'n', 'y', 't', 's', '1369', '4461', 'f', '1315', 'l', '5221', '6583', 'h', 'j', 't']
Example Output: b, f, g, h, j, l, n, s, t, v, x, y, z

Example Input: ['i', '9447', 'f']
Example Output:
f, i