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: ['4667', 'D', 'R', '6195', '1467', 'K', 'G', '5821']

4667, 4, 18, 6195, 1467, 11, 7, 5821