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: ['I', '5077', '6501', 'm', '9949', 'b', '7659', 'e', '4293', '4121', 'K', '3035', '5499', 'p', '7733', '433', '3723', '3757', '9439', 'C', 'r', '7305', '1963', '1953', '1213', 'R', '6851', '939', '7735', '2937', 'Q', 'j', '5339', 'H', 'y']

9, 5077, 6501, 13, 9949, 2, 7659, 5, 4293, 4121, 11, 3035, 5499, 16, 7733, 433, 3723, 3757, 9439, 3, 18, 7305, 1963, 1953, 1213, 18, 6851, 939, 7735, 2937, 17, 10, 5339, 8, 25