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: ['e', '2239', 'l', '8309', 'i', '2613', 'i', '611', '6481', 'j', 'v', '1867', '415', '269', '8053', '3369', 'q', 't', '2303', '7729', '1059', '6135', '3299', 'd', '6855', '207', '6227', '7859']
Example Output: d, e, i, j, l, q, t, v

Example Input: ['z', '3219', '6399', '2357', '7597', '357', 'k', 'k', 'u', 'd', '6115', 'w', '2921', '8809']
Example Output: d, k, u, w, z

Example Input: ['3007', '8663', 'o', 'j', 'c', 'f', 'z', '3859', '1761', 'h', '2685', '129', 'm', 'c', 'm', '1543', 'l', 'c', '4491', 'r', 'd', 'w', '6025', '8849', '6557', '3197', 'y', '7111']
Example Output:
c, d, f, h, j, l, m, o, r, w, y, z

