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: ['207', '3073', 'i', 'z', 'L', '7945', 'Z', 'L', '9089', 'e', '6293', 'Z', 'w', '5455', '3665']

207, 3073, 9, 26, 12, 7945, 26, 12, 9089, 5, 6293, 26, 23, 5455, 3665