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', 'B', '665', '1065', 'I', '6265', 'j', '7867', 'f', 's', 'o', '4771', '3467', 'r', '6071', 'Y']

14, 2, 665, 1065, 9, 6265, 10, 7867, 6, 19, 15, 4771, 3467, 18, 6071, 25