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: ['y', '9825', '6701', '2697', '8625', 'r', 'd', 'g', 'U', 'x', '1009', '3885', 'Y', 'z', '5497']

25, 9825, 6701, 2697, 8625, 18, 4, 7, 21, 24, 1009, 3885, 25, 26, 5497