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.
One example: ['8129', 'a', '4245', 'y', 'm', 'a']
Solution is here: a, m, y
Explanation: Here, the unique alphabets in the list are 'a', 'y', and 'm', hence their sorted order is 'a, m, y'.

Now, solve this: ['5551', 'j', 'y', 'e', '1723', 'z', '6387', '6325', '4033', '4261', '4411', '1169', '9145', 'g', 'l', 'g', 's', 'z', 'o', 'c', '3033', 'x', 'k', 'f', '5495', '6633', '3043', '6905', '2989', 'r', '8545', '2321', '7035', '9321', '6537', 't', 'p', 'h', '7533', '9069', 'e', 'm', '6487', 'e']
Solution:
c, e, f, g, h, j, k, l, m, o, p, r, s, t, x, y, z