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: ['2331', 'n', 'S', 'W', '9425', 'Z', 'z', 'o', '9867', '9297', '3713', 'U', 'r', '6477', 'r', '2767', '2925', 'U', '6605', 'c', 'N', '5359', 'z', '5117', 'C', '3429', 'X', 'L', 'P', '7581', '3405', '7871']

2331, 14, 19, 23, 9425, 26, 26, 15, 9867, 9297, 3713, 21, 18, 6477, 18, 2767, 2925, 21, 6605, 3, 14, 5359, 26, 5117, 3, 3429, 24, 12, 16, 7581, 3405, 7871