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: ['a', 'X', '379', 'G', 'N', '621', '7549', '8863', 'U', '4507', 'E', '3329', '115', 'a', '2257', '6995', 'p', 'S', 'K', 'M', '4363', 'V', '8327', '9581', '5137', '5083', '8839']

1, 24, 379, 7, 14, 621, 7549, 8863, 21, 4507, 5, 3329, 115, 1, 2257, 6995, 16, 19, 11, 13, 4363, 22, 8327, 9581, 5137, 5083, 8839