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: ['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']

A: e, f, h, j, l, n, o, p, q, s, t, u, v
****
Q: ['u', '4021', 'u', 'd', 'j', 'p', 'i', 'z', '3223', 'f', 's', 'l', 'p', 'd', '5031', '1059', '7875', '2097', 'q', 'i', '8813', '2017', 'h', 'l', 'y', '57', '1561', 'f', 'j', 'z', '1901', 'u', 'j', 'x', '6561', '9239', '3333', '8793', '4915', '5821', 'h', 'f', '765', 'x']

A: d, f, h, i, j, l, p, q, s, u, x, y, z
****
Q: ['5785', 'y', 'w', '1963', '6635', '3331', '8709', '289', '7347', 't', '1281', 'h', '3479', '51', 'd', '2261', 'i', 'm', 'x', '8791', 'b', '2041', 'n', 'c', '2737', 'g', '1069', '7655', 's', 'i', 'c', 'a']

A:
a, b, c, d, g, h, i, m, n, s, t, w, x, y
****