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: ['9467', '6373', 'f', 't', 'R', 'l', '9319', 'w', 'C']

9467, 6373, 6, 20, 18, 12, 9319, 23, 3