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: ['2695', 'u', '2077', 'f', '9507', '1297', 'L', 'F', 'V', 'e', 'P', 'j', '5849', 's']

2695, 21, 2077, 6, 9507, 1297, 12, 6, 22, 5, 16, 10, 5849, 19