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: ['1697', '8071', '4113', '3079', 'u', 'i', '4003', 'L', 'w', 'y', 's', 'd', '7735', 'C', 'K', '4313', 'J', 'Z']

1697, 8071, 4113, 3079, 21, 9, 4003, 12, 23, 25, 19, 4, 7735, 3, 11, 4313, 10, 26