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: ['J', '6477', 'W', 'u', 'b', '5193', 'B', '4167', '4037', '5893', '8355', 'Z', '501', '5867', 'r', 'u', 'u', '8963', 'F', '9209', 'M', 'Y', 'U', 'R', 'i', 'n', 'F', '2647', 'W', 'r', 'U', 'S', 'd', 'v', '43', 'd', '8825', 'V', '7079', '7939']

10, 6477, 23, 21, 2, 5193, 2, 4167, 4037, 5893, 8355, 26, 501, 5867, 18, 21, 21, 8963, 6, 9209, 13, 25, 21, 18, 9, 14, 6, 2647, 23, 18, 21, 19, 4, 22, 43, 4, 8825, 22, 7079, 7939