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.

['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']
c, d, e, j, l, n, q, s, t, v, w, y, z

['w', '743', '5757', '8731', 'k', 'p', '317', 'n', 'x', '5649', 'l', 'm', 'c', '2499', 'l']
c, k, l, m, n, p, w, x

['8335', '4339', '3791', '9015', '3711', '9479', 'b', 'u', 'q', 'q', '3903', 'y', '5141', '1249', '3239', '1503', 't', 's', '9197', '9729', '7301', '3023']

b, q, s, t, u, y