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: ['s', 'k', '7887', 'P', 'J', 'Z', 'h', 'g', 'c', 'z', '7545', 'L', 'X', '1695', 'D', 's', 'U', 'Q', 'y', '989', '3371', '6673', '4867', 'x', 'H', 'G', '8081', '7285', '99', 'z', '1981', 'F', 'i', 'H', 'v', '9689', '6903']

19, 11, 7887, 16, 10, 26, 8, 7, 3, 26, 7545, 12, 24, 1695, 4, 19, 21, 17, 25, 989, 3371, 6673, 4867, 24, 8, 7, 8081, 7285, 99, 26, 1981, 6, 9, 8, 22, 9689, 6903