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: ['4475', 'Z', 'r', '2929', 'y', 'g', '1791', 'm', '8073', 'U', '6069', '6901', '8071', 'n', '1299', 'G', 'J', 'D', 'z', '6813', 'g', 'i', 'y', '779', 'B', 'p', 'I', 'z', '2809', '3901', 'o', '2151', 'S', '2187', 'e', '3449', '9143', 'y', 't', '5845']

4475, 26, 18, 2929, 25, 7, 1791, 13, 8073, 21, 6069, 6901, 8071, 14, 1299, 7, 10, 4, 26, 6813, 7, 9, 25, 779, 2, 16, 9, 26, 2809, 3901, 15, 2151, 19, 2187, 5, 3449, 9143, 25, 20, 5845