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: ['4269', '1847', '2025', '601', 'g', 'n', 'h', '3499', '4977', '3579', '9355', '3489', 'm', 'm', '4401', '4605', 'l', '3977', 'h', 'd', 't', '5135', '7787', 'k', 'q', '7699', '5325', '6269', '1865', 'h', '8915', '5677', 'g', '603', '1435']
Example Output: d, g, h, k, l, m, n, q, t

Example Input: ['3127', '9253', '5667', '9453']
Example Output: -1

Example Input: ['e', 'l', '1245', '8443', '2521', 'w', 'c', 'o', 'k', '9845', 'u', '6587', '2417', 't']
Example Output:
c, e, k, l, o, t, u, w