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: ['3247', '895', '3399', 'D', 'p', '6027', '1889', '7463', '7431']

3247, 895, 3399, 4, 16, 6027, 1889, 7463, 7431