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: ['9707', 'S', '1269', '3609', 'V', 'P', 'c', '7799', '7575', 'A', 'Q', 'h', 'f', 'x', 'N', '6897', '2767', '457', 'r', 'K', 'J', 'v', 'a', '9319', '8355', 'b', '7133', 'L', 'l', '8343', '1903', '339']

9707, 19, 1269, 3609, 22, 16, 3, 7799, 7575, 1, 17, 8, 6, 24, 14, 6897, 2767, 457, 18, 11, 10, 22, 1, 9319, 8355, 2, 7133, 12, 12, 8343, 1903, 339