In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
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Question: ['325', '203', 'x', 'r', '189', 't', 'q', '277', '315', 'w', '377', 'g', 'l', '87', 'f']

Answer: 0, 1, 2, 3, 5, 7, 8, 9


Question: ['r', '171', 'p', '299', 'u', 'n', '421', '331', 'h', '21', 'h', 'x', '435', '327', '373']

Answer: 1, 2, 3, 4, 5, 7, 9


Question: ['u', '157', '63', '411', 'x', 'c', 'k', 'z', 'i', '279', '311', '431']

Answer:
1, 2, 3, 4, 5, 6, 7, 9