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: ['d', 'b', 'I', '7749', '9163', 'i', '3359', '7055', 'R', '3845', 'B', 'M', '3153', '5397', 'Z', '5039', '9841', 'd', '7711', '6799', '815', 'J', '8631', '9221', '9085', '139', 'Y']

4, 2, 9, 7749, 9163, 9, 3359, 7055, 18, 3845, 2, 13, 3153, 5397, 26, 5039, 9841, 4, 7711, 6799, 815, 10, 8631, 9221, 9085, 139, 25