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: ['2283', 's', 'i', 'U', 'o', '2265', 'P', '8817', 'O', 'Z', 'C', 'F', '8529', '2971', 'f', '1075', 'K', '2503', '2323', '3003', '5089', 'E', 'M', '23']

2283, 19, 9, 21, 15, 2265, 16, 8817, 15, 26, 3, 6, 8529, 2971, 6, 1075, 11, 2503, 2323, 3003, 5089, 5, 13, 23