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.

['3627', '2051', '3203', 'c', 'r', 'a', '1453', 'e', 'z', 't', '1093', '4651', 'a', 'f', '8159', '9623', 'l', 't', 'r', '6963', '7071', '8103', '3493', 'y', '2369', '609', '2011', 'f', '187', 'f', 'c']
a, c, e, f, l, r, t, y, z

['4213', '3595', '7937', 'y', '5723', 'v', 'b', '7007']
b, v, y

['c', '2695', 'q', '7795', '8227', 'q', '9035', '4043', '733', 'e', '9975', '1023', 'v', '8807', 'j', '1597', 'x', 'z', 'o', '8075', '6469', '5943', 'a', '8097', '439', 'u', 'r', 'v', '2761', 'u', '4015']

a, c, e, j, o, q, r, u, v, x, z