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: ['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: ['m', '6443', 'd', 'o', 'p', 'q', '3765', 'k', 'm', 'y', 'j', '3531', 'y', 't', '671', 'j', '3699', 'a', 'i', '1843', 't', 'd', '1205', 'k', 'h', '1209', '2913', '1301', 'k', 'd', '1769', '7985', 's', 'p', 'f', '4583']
Example Output: a, d, f, h, i, j, k, m, o, p, q, s, t, y

Example Input: ['d', '3537', 'j', 'p', 'n', 'd', '6493', '2113', 'y', '9655', 'z', 'e', 'k', '7141', '9649', '741', '6557', '1071', '4049', '4159', '4699', '8779', 'd', 'q', '8267', '1297', '5969', 'x', '1575', 'c', '507', '2329', '1725', '1367', '3055', '3315', 'z', '2293', 'e']
Example Output:
c, d, e, j, k, n, p, q, x, y, z