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: ['4783', 'o', '6473', 'u', 'g', '1065', 'a']

4783, 15, 6473, 21, 7, 1065, 1