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: ['z', 'J', 'A', '2919', 'z', 'i', 'O', '9675', 'L', '3929', 'p', 'p', '6585', 'j', 'O', '61', 'X', 'B', '2873', '3347', '7513', 'T', '1013', 'h', '2861', '6689', '961', 'o']

26, 10, 1, 2919, 26, 9, 15, 9675, 12, 3929, 16, 16, 6585, 10, 15, 61, 24, 2, 2873, 3347, 7513, 20, 1013, 8, 2861, 6689, 961, 15