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: ['I', '6895', '13', '1719', '8239', '6573', 'z', 'D', '1597', 'g', 'x', '7161']

9, 6895, 13, 1719, 8239, 6573, 26, 4, 1597, 7, 24, 7161