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: ['u', 'g', 'Q', 'T', '29', '1609', 'c', '9399', 'n', 'g', '6009', '4437', '1427', 'D', 'N', 'z', 'O', 'r', 'H', '8057', 'H', '6213', 'n', '7723', '3369', 'v', '4683', '1361', 's', '7659', 'f', 'G', '7549', 'r', '6285', '7631', '2831', '3715']

21, 7, 17, 20, 29, 1609, 3, 9399, 14, 7, 6009, 4437, 1427, 4, 14, 26, 15, 18, 8, 8057, 8, 6213, 14, 7723, 3369, 22, 4683, 1361, 19, 7659, 6, 7, 7549, 18, 6285, 7631, 2831, 3715