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: ['8939', '9295', 'Z', '8199', 'O', 'C', 'V', '6073', 'm', '9563', '6161', 'u', '8195', '2115', 'P', '4753', 'b', 'A', '3365', '9613']

8939, 9295, 26, 8199, 15, 3, 22, 6073, 13, 9563, 6161, 21, 8195, 2115, 16, 4753, 2, 1, 3365, 9613