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', 'O', 'E', 't', 'v', 'd', '4633', 'v', 'u', '7169', 'o', 'u', '1765', 'Z', '9353', 'A', '8395', 'O', '5573', 'i', 'c', 'l', '4121', 'e', 'B', '3059', 'N', 'L', 'X']

3, 15, 5, 20, 22, 4, 4633, 22, 21, 7169, 15, 21, 1765, 26, 9353, 1, 8395, 15, 5573, 9, 3, 12, 4121, 5, 2, 3059, 14, 12, 24