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: ['C', '393', 't', 'E', 'B', 'a', '521', '5527', '9181', '4173', '521', '2203', 'c', '1455', '7499', '5563', 'w', '8355', '4901', 'E', '6185', 'D', 'H', '2695', 'F', 'X', 'C', 'd', 'a', '7061', '3283', 'z', 'q', '4859', '2067', '9179', 'i', '6479', 'D']

3, 393, 20, 5, 2, 1, 521, 5527, 9181, 4173, 521, 2203, 3, 1455, 7499, 5563, 23, 8355, 4901, 5, 6185, 4, 8, 2695, 6, 24, 3, 4, 1, 7061, 3283, 26, 17, 4859, 2067, 9179, 9, 6479, 4