Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['1315', '5981', 'D', 'b', '5043', 'g', 'Q', 'v', 'C', '9823', '1841', 'M', '2681', 'H', '7215', '4393', '4349', 'v', 'y', 'H', '3791', 'H', '9801', 'm', '9281', 'Y', 'f', 'b', 'C', 'x', 'b', '1401', 'C', '4111', '5205']

1315, 5981, 4, 2, 5043, 7, 17, 22, 3, 9823, 1841, 13, 2681, 8, 7215, 4393, 4349, 22, 25, 8, 3791, 8, 9801, 13, 9281, 25, 6, 2, 3, 24, 2, 1401, 3, 4111, 5205