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: ['f', 'b', 'T', '7349', '8673', 'C', '3379', '8867', '163', 'J']

6, 2, 20, 7349, 8673, 3, 3379, 8867, 163, 10