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: ['7789', '5033', 'X', 'j', 'n', 'M', 'p', '5259', '6877']

7789, 5033, 24, 10, 14, 13, 16, 5259, 6877