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', 'q', '8635', '2047', '7351', '7295', '6747', '8151', 'g', 'b', 'D', '5521', '8201', 'r', 'F']

4, 17, 8635, 2047, 7351, 7295, 6747, 8151, 7, 2, 4, 5521, 8201, 18, 6