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: ['x', 'u', 'm', '8089', '9985', 'e', '2927', 'n', '7085', 'q', 'v', 'f', 'p', '5079', '3339', '7871', 'h', '7389', '733', 'e', '3387', 'b', 'x', 'z', '2039', 'u', '59', '5031', '8115', '5447', '3045', 'x', '6591', '9561', '4315']
Example Output: b, e, f, h, m, n, p, q, u, v, x, z

Example Input: ['n', 'h', 'h', 'e', 'p', '1265', '4853', '9433', '1227', '1619', '6381', 'o', '8285', 'k', 'u', '7471', 'm', '6887', '6579', '5813', '5563', '8535', 'n', '3743', 'h', 't', '4497', '2791', 'e', 'v', '6769', '7969', 'x', 't', 'x', 'q']
Example Output: e, h, k, m, n, o, p, q, t, u, v, x

Example Input: ['a', '1199', '111', '5613', '4887', 'b', '5791', 'n', '1905', '8331', '4067', 'u', '5849', 't', 'c', 'g', 'v', '21', '1965', '6163', 'k', '9845', '9527', '6377', '1159', 'v', 'k', '119']
Example Output:
a, b, c, g, k, n, t, u, v