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: ['3097', '9189', '6415', 'u', 'Q', 'A', '1177', '5731', 'u', '4027', 'z']

3097, 9189, 6415, 21, 17, 1, 1177, 5731, 21, 4027, 26