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: ['5447', 'v', 'S', 'F', '6039', 'U', '2635', '3493', 't', 'Z', '675', 'p', 'q', '5367', 'e', '1749', '1323', '8083', '6475']

5447, 22, 19, 6, 6039, 21, 2635, 3493, 20, 26, 675, 16, 17, 5367, 5, 1749, 1323, 8083, 6475