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: ['S', '6385', 'y', '4663', 'e', '3627', 'y', 'o', '3863', '5399', '7201', '6451', '7845', '7187', 'E', 'L', '5289', 'V', 'b', '2961', '3159', '3629', '3979', 'Z', 'S', '515', '9539', '1205', '5131', 'c', '2395', 'B', '1383', 'd', '7039', '7275', '6117', '3721', '4339']

19, 6385, 25, 4663, 5, 3627, 25, 15, 3863, 5399, 7201, 6451, 7845, 7187, 5, 12, 5289, 22, 2, 2961, 3159, 3629, 3979, 26, 19, 515, 9539, 1205, 5131, 3, 2395, 2, 1383, 4, 7039, 7275, 6117, 3721, 4339