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: ['2749', '1261', '3389', '8385', '855', '4695', '1755', 'd', 'H', 'k', 'X', 'Z', '8043', '4085', '6439', 'i', 's', 'K', '4639', '4195', 'g', '5843', 'l']

2749, 1261, 3389, 8385, 855, 4695, 1755, 4, 8, 11, 24, 26, 8043, 4085, 6439, 9, 19, 11, 4639, 4195, 7, 5843, 12