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: ['8315', 'b', '4333', 'f', '6507', '6211', '3475', 'c', 'e', '8039', '661']
Example Output: b, c, e, f

Example Input: ['3043', 'r', 'm', 'i', '2653', 'i', '1703', '1125', '6299', '4863', 'n', 'h']
Example Output: h, i, m, n, r

Example Input: ['l', 'w', 'i', 'c', '5051', '5169', '3919', 'o', 'j', '7339', '3185', '5337', '9927', '6469', 'n', '1161', 'u', 'c', '4767', 's', '3373', 'x', '1889', 'm', 'd', '3551', '817', '8577', '5297', '7755', 'd', 'x', 'i', '8921']
Example Output:
c, d, i, j, l, m, n, o, s, u, w, x