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: ['n', 'h', 'j', '5945', '8511', 'y', '7739', '4717', '2483', 'p', '9545', '7647', '9863', '5591', '5393', 'i', '9225', '589', '1497', 'j', 'm', '2397', 'a', 'd']

A: a, d, h, i, j, m, n, p, y
****
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: ['427', '6167', '6175', '2259', '1653', '9221', 'z', '6163', 'w', '7073', '3563', 'n', 'n', '3163', 'm', 'z', 'p', 'p', 'u', 'q', '4155', '9477', 'j', '6951', 'b']

A:
b, j, m, n, p, q, u, w, z
****