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: ['8665', 'l', '3365', 'i', 'G', 'Z', '6919', '6903']

8665, 12, 3365, 9, 7, 26, 6919, 6903