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: ['6683', 'm', '4967', 'I', 'x', 'q', '9507', 'G', 'R', '9235', 'g', 'L', 'b', 'D', 'W', '9391', 'Q', 'R', '7739', 'e', 'E', '8201', '1273', 'W', '673', '8617']

6683, 13, 4967, 9, 24, 17, 9507, 7, 18, 9235, 7, 12, 2, 4, 23, 9391, 17, 18, 7739, 5, 5, 8201, 1273, 23, 673, 8617