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: ['t', '9953', 'B', '4075', '5867', '3227', 'G', '8309', 'f', 'B', 'I', 'x', 'a', 'w', 'E', '9905', 'j']

20, 9953, 2, 4075, 5867, 3227, 7, 8309, 6, 2, 9, 24, 1, 23, 5, 9905, 10