Detailed Instructions: 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: ['2783', '3251', 'w', 't', '2313', '2107', 'c', '9953', 'h', 'i', '4789', '189', '3693', 'f', '4225', 'm', '9043', 'g', '6165', 'j', 'v', '8523', '9077', '5699', 'q']
A:
c, f, g, h, i, j, m, q, t, v, w