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: ['9847', 'g', 'p', 'Z', '969', 'S', 'u', '5775', '9413', '1413', 'O', 'I', '7583', '6897', '8515', '8269', '9967', 'B', '9397', '4607', '4749', 'Q', 'B', 'M', '1503', 'g']

9847, 7, 16, 26, 969, 19, 21, 5775, 9413, 1413, 15, 9, 7583, 6897, 8515, 8269, 9967, 2, 9397, 4607, 4749, 17, 2, 13, 1503, 7