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: ['6859', '5223', '6635', 'e', 'h', '3835', '5627', 'a']

6859, 5223, 6635, 5, 8, 3835, 5627, 1