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.
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Question: ['e', 'c', '4241', '2685', 'o', '9859', 'z', '2647', 'b', 'c', 'y', '1985', '5985', '5709', '6655', 'q', 'z', '9933', '6817', '6477', '1837', 'x', 'p', '9251', '3787', 'v', '5741', 'e', 'p', '493', '5949', '5519', 'v', 'g', '1403', 'z', 'h', 'z']

Answer: b, c, e, g, h, o, p, q, v, x, y, z


Question: ['l', 'g', 'd', 'p', '8163', '6643', 'o', 'p', 'm']

Answer: d, g, l, m, o, p


Question: ['t', 'h', '1421', 'j', '1649', '3631', 'g', '93', '6033', '3951', '6403', '7541', 'd']

Answer:
d, g, h, j, t