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: ['5375', '8319', 'D', '5961', 'n', '2339', 'p', '2373', 'i', '7805', 'V', 'm', 'o', 'X', 'u', 'H', '7941', 'X', 'q']

5375, 8319, 4, 5961, 14, 2339, 16, 2373, 9, 7805, 22, 13, 15, 24, 21, 8, 7941, 24, 17