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', 'Q', 'R', 'c', '7881', '583', 'c', '8909', '9177', '423', 'g', '2387', '1519', '3369', 'J', 'X', 'c', '3299', '1825']

13, 17, 18, 3, 7881, 583, 3, 8909, 9177, 423, 7, 2387, 1519, 3369, 10, 24, 3, 3299, 1825