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: ['4919', 'G', '5149', 'C', '9101', '4373', 'm', '9189', '887', 'B', '1551', 'D', '4429', 's', 'v', '1649', 'i', '6371', '6141', '1125', 'E', '6033', 'l', '4157', 'h', 'L', 'Y', '9835', '9113', '2367', '8295', '2815']

4919, 7, 5149, 3, 9101, 4373, 13, 9189, 887, 2, 1551, 4, 4429, 19, 22, 1649, 9, 6371, 6141, 1125, 5, 6033, 12, 4157, 8, 12, 25, 9835, 9113, 2367, 8295, 2815