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: ['4049', 'O', 'n', 'i', 'j', '4261', 'd', '7641', 'V']

4049, 15, 14, 9, 10, 4261, 4, 7641, 22