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: ['o', '1217', '449', 'n', 'e', 'o', 't', '9043', '1925', '5687', '7197', '7943', 'u', '5053', 'q', 'e', '89', 'l', 'h', '3083', '4295', 'o', 'n', '6309', '743', 'n', 'j', '2105', 's', '6845', 'p', 'p', '1355', '3757', 'v', 'f', '961', '4623', '4633', 'p', '4593', 'p', '7337', 'o', 'u']
Example Output: e, f, h, j, l, n, o, p, q, s, t, u, v

Example Input: ['7301', '7999', 'x', 'r', '6881', 'e', '609', 's', '7495', 'a', 's', '1961', 'q', 'x', '373', '6289', '4847', '5969', 't', '5487', '7639', '9039', '2395', 'b', 'd', '1447', 's', '8137', 's', '443', 'f', 'z', '4823', 'k', 'i', 'o', '4739', 'w', 'f', '8853', 'a']
Example Output: a, b, d, e, f, i, k, o, q, r, s, t, w, x, z

Example Input: ['5747', 'd', 'r', 'h', '3953', '3773', '1383', '2471', 'k', '7713', '5769', 'k', 'j', '4215', 'c', 'p', 'k', '8339', '925', 's', 'v', '6873']
Example Output:
c, d, h, j, k, p, r, s, v