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: ['d', '4375', '4703', '7601', '8629', 'y', 'Z', '3637', 'A', '7339']

4, 4375, 4703, 7601, 8629, 25, 26, 3637, 1, 7339