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: ['4123', '1397', '103', 'w', 't', 'j', '233', '7239', 'b', 'n', 't', '6273', 'l', '1167', '8389', '5609', '9029', '7741', 'o', 'p', '6547', '5593', 'd', '8401', 's', '4243', 's', 'u', 'm', '6659', '5691', '2105', '8897']

A: b, d, j, l, m, n, o, p, s, t, u, w
****
Q: ['4653', 'e', 'c', 'j', '6739', '3963', 'q', '4649', 'v', 's', 'j', '9757', '8075', '6253', '4365', 's', '9101', 'd', '6989', 't', '5687', '7389', '139', '4029', '5073', 'q', 'e', '2455', '1075', 'j', '1329', 'l', '4689', 't', 'z', '4179', 's', 'l', 'w', 'n', '6569', '8907', 'v', '605', 'y']

A: c, d, e, j, l, n, q, s, t, v, w, y, z
****
Q: ['i', 'l', '2623', '9381', 'y', '655', 'y', '9741', '875', 'l', '3057', 'y', '6883', 'b', 'r', '9923', '6389', '9261', '2547', 'h', 'k', '8369', 'v', '3239', 'e', '9889', '4077', 'q', '9059', '5557', 'h', 'h', '3443', '3215', '5581', 'u', '1035']

A:
b, e, h, i, k, l, q, r, u, v, y
****