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', 'E', '3599', '7005', 'Z', '4461', 'Z', '8425', 'A', '8299', 'I', '8315', '6295', 'I', '9055', 'B', 'y', '2011', '7157', 'H', '1653', '503', 'E', '8463', 'g', '7233', '8725', 'T', '6273', 'd', '3667', '4609', 'f', 'T', 'y', '9539']

26, 5, 3599, 7005, 26, 4461, 26, 8425, 1, 8299, 9, 8315, 6295, 9, 9055, 2, 25, 2011, 7157, 8, 1653, 503, 5, 8463, 7, 7233, 8725, 20, 6273, 4, 3667, 4609, 6, 20, 25, 9539