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: ['5427', '1623', '6525', '8925', 'b', 'd', '7473']

5427, 1623, 6525, 8925, 2, 4, 7473