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: ['8527', 'p', '4697', '8415', 'v', 'l', '2669', '2649', '4349', '4201', 'r', '7573', '2041', 'f', '8047', 'u', 'm', 'm', 'j', '5695']

A: f, j, l, m, p, r, u, v
****
Q: ['i', 'y', '8339', 'd', 'b', '7471', '6577', '9037', '4503', '6287', '1439', '8863', '9201', '2661', 'x', 'l', 'v', 'w', 'a', 'f', '8885', '519', '7631', 'g', '7203', '8605', '2429', '9165']

A: a, b, d, f, g, i, l, v, w, x, y
****
Q: ['557', 'r', '5953', 'x', '7109', '1473', '49', 'v', '527', '9297', '4407', '2255', 'l', '9495', '1495', 'v', '6205', 'a', '7969', '1083', '6099', '671', 'y', 'g', '1659', 't', 'c', 'h', '7773', '3599', '199', 'a', '6801', 'e', '1317', '9991', '203', 'k', 'j']

A:
a, c, e, g, h, j, k, l, r, t, v, x, y
****