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]: ['i', '9575', '8995', 'm', 'o', '3015', '4005', '6909', '7195', '3361', 'j', '5253', '9523', '8879', '5861', 'e', 'y', 'e', '1525', 'i', '807', '8469', '3333', '4017', '2237', '3387', 'o', '643', 'p', '7129', '6243', 'y', '4913', 'z', 'f', '6909', 'f', '4347', '7227', 'o', 's', '9909', '8611']
[A]: e, f, i, j, m, o, p, s, y, z


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


[Q]: ['l', '9045', 'm', 'j', '5415', '3965', 'd', 'z', '3069', '979', '5817', 'n', '7395', 'e', '4497', '4687', '9683', '5807', '2157', 'c', '6333', '1451', 'n', '9267', 'z', '8269', '7965', '9579', 'z', 'o', 'k', '4971', 'x', '4395', '5643', '9075', '2163', '3593']
[A]:
c, d, e, j, k, l, m, n, o, x, z