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: ['N', '7463', 'D', 'S', '8811', '6495', '7519', 'D', '8735', 'W']

14, 7463, 4, 19, 8811, 6495, 7519, 4, 8735, 23