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', 'V', '4265', '6819', '2963', 'M', '2301', '1585', '2421', '6179', '6119', 'g', '8923', 'Z', 'l', '9111', 'u', 'A', '1787', '5227', 'c', '2403', '4345', '3659']

13, 22, 4265, 6819, 2963, 13, 2301, 1585, 2421, 6179, 6119, 7, 8923, 26, 12, 9111, 21, 1, 1787, 5227, 3, 2403, 4345, 3659