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: ['z', 'H', '4517', '9659', 'R', '7897', '3241', '5191', '9375', 'r', 'o', '9471', '3321', 'G', '605', 'w', 'T', 'x', 'f', 'W', '7027', '7347', 'F', 'T', '6907', '6261', 't', '8119', '1547', 'c', 'n', '2321', '7907', 'k', 'w']

26, 8, 4517, 9659, 18, 7897, 3241, 5191, 9375, 18, 15, 9471, 3321, 7, 605, 23, 20, 24, 6, 23, 7027, 7347, 6, 20, 6907, 6261, 20, 8119, 1547, 3, 14, 2321, 7907, 11, 23