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: ['2263', 'y', '3427', 'S', '5735', 'J', 'm', 'G', 'g', '2633', 'R', '6837']

2263, 25, 3427, 19, 5735, 10, 13, 7, 7, 2633, 18, 6837