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: ['3419', 'A', 'V', 'h', '1491', '49', 'a', 'v', 'M', '9657', '4303', 'r']

3419, 1, 22, 8, 1491, 49, 1, 22, 13, 9657, 4303, 18