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: ['7861', 'A', 'F', '2023', 'd', 'M', 'Z', 'E', 'I', 'Q', '6675', 'S']

7861, 1, 6, 2023, 4, 13, 26, 5, 9, 17, 6675, 19