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: ['z', '8105', '7873', 'U', '5981', 'v', 'F', '1079', '8129', '8141']

26, 8105, 7873, 21, 5981, 22, 6, 1079, 8129, 8141