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: ['g', 'M', '5475', 'p', 'V', '6571', '8913']

7, 13, 5475, 16, 22, 6571, 8913