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: ['e', '2239', 'l', '8309', 'i', '2613', 'i', '611', '6481', 'j', 'v', '1867', '415', '269', '8053', '3369', 'q', 't', '2303', '7729', '1059', '6135', '3299', 'd', '6855', '207', '6227', '7859']

A: d, e, i, j, l, q, t, v
****
Q: ['5249', '3915', '1013', '5083', 'g', 'g', 'e', '4603', '7463', 'k', 'p', 'b', 'm', 'x', '5185', 't', 'w', '1289', '8527', '9555', '6365', '5757', 'n', 'l', '8681', '7199', 'x', '6393', '6729', 'f', 'c', 'r', '3291', 'k']

A:
b, c, e, f, g, k, l, m, n, p, r, t, w, x
****