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: ['f', 's', '6109', 'd', '2263', '5101', '5881', '43', '2843', 'H', '8683', 'A', '3299', 'j']

6, 19, 6109, 4, 2263, 5101, 5881, 43, 2843, 8, 8683, 1, 3299, 10