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: ['A', 'j', 'm', '5159', '8971', '4351', '5869', '8061']

1, 10, 13, 5159, 8971, 4351, 5869, 8061