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: ['n', '7057', 'n', 'z', '1923', '8065', 'd', '9417', 'o', '1065', 'b', 'O', 'n']

14, 7057, 14, 26, 1923, 8065, 4, 9417, 15, 1065, 2, 15, 14