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: ['C', '1327', '6921', 'b', '1059', 'b', '4045', 'H', '69', '7571', 'F', 'I', 'M', 'q', '445']

3, 1327, 6921, 2, 1059, 2, 4045, 8, 69, 7571, 6, 9, 13, 17, 445