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.

Input: Consider Input: ['c', '6027', 'o', 'h', 'l', '7893', 'u', 'f', '7661', '4715', '1373', '4799', 'd', 'z', '411', '4753', 'd', '8241', '1589', '4173', '3921', 'j', 'o', '5067', '8879', 'e', 'm', '9543', '9625', '855', 'u', 'd', '5859', '4243', '5747', '5147', '7315', 'd', 'x', 'q', '7841', '7397', 'm']

Output: c, d, e, f, h, j, l, m, o, q, u, x, z


Input: Consider Input: ['3035', 'f', 'k', 'e', '3023', 'p', '9667', '5277', '4757', '8433', 'g', '1399', '7721', 'n', 'p', '7469', '7581', '5679', 'g', 'q']

Output: e, f, g, k, n, p, q


Input: Consider Input: ['5357', '9785', '2157', '9203', '1705', 'd', 'y', '9867', '2251', '1875', 's', '3161', '2411', 'z', '7475', 'n', 's', 'b', '1281', 'n', 'w', '6401', 'l', 'b', 's', 'y', 'r', 'o', '8397', '4477', '827']


Output: b, d, l, n, o, r, s, w, y, z


