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: ['4373', '3801', '6075', '3013', 'm', '8083', 'o', 'k', 'S', 'V', 'S', 'F', '2235', 'Q', 'T', 'A', 'y', '1909', 'a', '7367', 'l', 'f', 'K', 'U']

4373, 3801, 6075, 3013, 13, 8083, 15, 11, 19, 22, 19, 6, 2235, 17, 20, 1, 25, 1909, 1, 7367, 12, 6, 11, 21