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: ['889', '4825', 'P', '8127', 'k', '707', '2419', '5021', 'B', '7247', 'J', 'J', '889', '221', '8877', '5847', '3713', 'b', 'f', '999', 'H', 'V', 'G', '9065', 'u', 'J', '1027', '273', '6425', '4825', 'd', 'U', 'o']

889, 4825, 16, 8127, 11, 707, 2419, 5021, 2, 7247, 10, 10, 889, 221, 8877, 5847, 3713, 2, 6, 999, 8, 22, 7, 9065, 21, 10, 1027, 273, 6425, 4825, 4, 21, 15