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: ['R', 'X', '6851', '7275', 'N', '3989', 'e', 'i', 'i', '8227', '2165', 'K', 'Z', '5177', 'A', 'K', '5759', '8959', 'g', 'R', 'e', 'X', '8551', '8729', 'V', 'W', 'D', '5481', 'T', 'j', '5799', '9877', 'V', 'H']

18, 24, 6851, 7275, 14, 3989, 5, 9, 9, 8227, 2165, 11, 26, 5177, 1, 11, 5759, 8959, 7, 18, 5, 24, 8551, 8729, 22, 23, 4, 5481, 20, 10, 5799, 9877, 22, 8