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.

Q: ['w', 'o', 'l', '5331', 'k', '9325', '6759', '7931', '8185', 'w', 'h', 'h', 'x', '4357', '6845', 'v', 'o', '8401', 'u', 'g', 'f', 'j', 'j', '2493', '4753', 'c', 'm', '1469', '4307', 'm', '2737', 'n', 'y']

A: c, f, g, h, j, k, l, m, n, o, u, v, w, x, y
****
Q: ['u', '9249', 'u', 't', 'm', 'm', 'n', 'w', '8617', '2729', 'i', 'l', '2971', '3227', 'b', '9017', '4711', 'i', 't', 'r', 'a', 'a', '1701', '6397', '4535', '9167', '6039', '6111', '849', 'p', '8197', '2645', '5147', 'u', 'l', '7419', 'w', 'w', 'k', 'x', 'c', '3377', '4015', '1297', 'f']

A: a, b, c, f, i, k, l, m, n, p, r, t, u, w, x
****
Q: ['z', 'x', '4821', 'e', '5269', '9711', '477', '5855', '8155', 'k', 'm', 'n', '5403', 'r', 'w', 'k', 's', 's', 'i', '5425']

A:
e, i, k, m, n, r, s, w, x, z
****