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: ['d', '5165', '4401', 'H', 'u', '3789', 'P', 'J', 'E', 's', 'Y', 'Y', '6257', '3445', 'I', '9177', '4495', '5267', '9809', '5967', 'J', '299', 'k', 'G', 'S', 'U', '7613', '2149', '9231', '6493', '9467', 'M', 'P', 'm', '3783', '1661', '967', '59']

4, 5165, 4401, 8, 21, 3789, 16, 10, 5, 19, 25, 25, 6257, 3445, 9, 9177, 4495, 5267, 9809, 5967, 10, 299, 11, 7, 19, 21, 7613, 2149, 9231, 6493, 9467, 13, 16, 13, 3783, 1661, 967, 59