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: ['M', '7525', 'V', 'Z', 'I', '8509', '1129', 'c', '1865', '6523', '4877', 'B', '7769', '2313', 'D', '4671', '473', 'w']

13, 7525, 22, 26, 9, 8509, 1129, 3, 1865, 6523, 4877, 2, 7769, 2313, 4, 4671, 473, 23