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: ['w', '5531', '9103', 'I', 'W', '8305', 'q', '2429', '1521', '545', '4637', 'a', 's', 'f', '3715', 'i', '729', 'V', '6671', 'B', '3877', '7891', 'Y', '1217', 'z']

23, 5531, 9103, 9, 23, 8305, 17, 2429, 1521, 545, 4637, 1, 19, 6, 3715, 9, 729, 22, 6671, 2, 3877, 7891, 25, 1217, 26