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: ['x', 'B', '6257', '1219', 'F', '735', 'x', 'H', '4885', 'v', '9187', 'e', 'H', '873', 'g', 'h', 'q', 'F', 'k', '7335', '2367', 'j', 'D', 'W']

24, 2, 6257, 1219, 6, 735, 24, 8, 4885, 22, 9187, 5, 8, 873, 7, 8, 17, 6, 11, 7335, 2367, 10, 4, 23