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: ['A', 'c', '1387', 'J', 'o', 'u', '9577', 'S', '6881', 'V', '3379', '3717', '5707', '8549', 'A', 'x', '7119', '2313', '5227', 'g', '3833', '1541', 'a', 'k', '1711', 't', '8527', '2179', '8463']

1, 3, 1387, 10, 15, 21, 9577, 19, 6881, 22, 3379, 3717, 5707, 8549, 1, 24, 7119, 2313, 5227, 7, 3833, 1541, 1, 11, 1711, 20, 8527, 2179, 8463