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: ['7065', 'q', 't', '3177', '9035', 'i', 'l', 'd', '8961', '1183', '6507', 'u', 'c', 't', '2467', '7659', 'e', '8963', 'j', 'g', 'p', '6779', '7115']

Output: c, d, e, g, i, j, l, p, q, t, u


Input: Consider Input: ['f', '7573', '2067', 'n', '3671', '7969', '7889', '4893', '6501', 'l', 'y', '4331', 'a', 'e', '2081', '3863', 't', 'j', '7921', 's', '7203', '7797', 'f', '4279', '1299', '987', '5003', '9071', '9559', '6061', '1889', '2653', 'm', 'w', '665', '7343', '9763', 'r', '6343', '9393', '9289']

Output: a, e, f, j, l, m, n, r, s, t, w, y


Input: Consider Input: ['3829', '2341', '3319', '529', '4417', '9271', 'c', 'm', 'd', '2761', '3729', 'l', '55', '1341', 'e', 'h', '2473', '6295', '1107', 'n', '4099', 'l', 'y', 'u', 'p', 'm', '9803', 'y', '8017', '7397', '7047', '2085']


Output: c, d, e, h, l, m, n, p, u, y