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: ['6665', 's', '7337', 'B', 'E', 'q', '7287', '7195', '9461', '1779', '1201', 'B', 'B', 'p', '9493', '8955', 'p', 'X', 'c', '307']

6665, 19, 7337, 2, 5, 17, 7287, 7195, 9461, 1779, 1201, 2, 2, 16, 9493, 8955, 16, 24, 3, 307