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: ['1279', '3705', 'f', 'w', 'A', '3723', '4317', '4201', '1695', 'D', '1137', 'B', 'P', 'G']

1279, 3705, 6, 23, 1, 3723, 4317, 4201, 1695, 4, 1137, 2, 16, 7