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: ['Y', '4057', 'F', 'D', '3623', 'U', 'z', 'C', 'Q', 'R', '2223', '7023', 'g', 'f', 'w', 'P', 'c', 't', '8673', 'l', '8997', '6637', 'L', 'c', '8939', '8987', 'x', '6247', 'y', 'I', 'g', 'Y', 'Z', '4587', 'G']

25, 4057, 6, 4, 3623, 21, 26, 3, 17, 18, 2223, 7023, 7, 6, 23, 16, 3, 20, 8673, 12, 8997, 6637, 12, 3, 8939, 8987, 24, 6247, 25, 9, 7, 25, 26, 4587, 7