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: ['2935', '4755', '6783', 'Q', 'C', '5567', 'E', '2629', 'N', '7517', 'z', 'S', 'G', 'S', 'V', '1725', 'b', 'k']

2935, 4755, 6783, 17, 3, 5567, 5, 2629, 14, 7517, 26, 19, 7, 19, 22, 1725, 2, 11