TASK DEFINITION: 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.
PROBLEM: ['g', '169', '93', 'z', 'h', '493', 'r']

SOLUTION: 1, 3, 4, 6, 9

PROBLEM: ['y', 'b']

SOLUTION: -1

PROBLEM: ['q', '203', '335', '475', '195', 'n', 'i', 'q', 'd', '321', 'l', 't', '163', '331', '341']

SOLUTION:
0, 1, 2, 3, 4, 5, 6, 7, 9