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: ['7033', 'y', '1575', '7105', '7001', '9793', 'M', '5807', 'R', '9233', 'X', '815', '3449', 'r', 'U', '645', '1153', 'V', 'O', '2059', '5433']

7033, 25, 1575, 7105, 7001, 9793, 13, 5807, 18, 9233, 24, 815, 3449, 18, 21, 645, 1153, 22, 15, 2059, 5433