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: ['8589', 'k', '2771', 'l', 'm', 'k', 'g', 'x', '6695', '3607', '3389', '6121', 'y', 'z', '9381', '1637', '9563', '9555', 'l', 'q', 't', '2763', 'r', '6019', 'h', 'g', 'j', 'd', 'e', '7863', 'h', 'q', '3203', '3345']
Solution:
d, e, g, h, j, k, l, m, q, r, t, x, y, z