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: ['9027', 'N', 'X', '8019', '9539', '3839', 't', 'A', 'f', '8083', 'i']

9027, 14, 24, 8019, 9539, 3839, 20, 1, 6, 8083, 9