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: ['9517', 'O', '499', '8885', 'f', '7881', '3611', 'F', 't', 'p', 'm', '1657', '4121', 'I', 'U', '9095', 'Q', '4627', '8183', 'U', 't', 'y', 'I', '1629', '3441', '2897', 'd', '1619', 'z', '6443', 'h', 'v']

9517, 15, 499, 8885, 6, 7881, 3611, 6, 20, 16, 13, 1657, 4121, 9, 21, 9095, 17, 4627, 8183, 21, 20, 25, 9, 1629, 3441, 2897, 4, 1619, 26, 6443, 8, 22