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: ['5237', 'z', '3463', 'r', '679', '6853', '8071', '5629', '3763', 'i', '6365']

5237, 26, 3463, 18, 679, 6853, 8071, 5629, 3763, 9, 6365