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', 'B', '1401', 'o', '3751', '193', '909', '1703', 'w', 'i', 'W', 'x', '6259', '1485', 'V', 'b', '2905', 'd', 'Y', 'v', 'M', '2865']

26, 2, 1401, 15, 3751, 193, 909, 1703, 23, 9, 23, 24, 6259, 1485, 22, 2, 2905, 4, 25, 22, 13, 2865