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: ['3895', '2319', 'm', '9653', 'c', 'E', '2729', '6023', '6893', 'a', 'I']

3895, 2319, 13, 9653, 3, 5, 2729, 6023, 6893, 1, 9