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', 'G', 'T', '2101', '4355', 'j', 'K', '4701', 'd', 'V', 'U', 'k', 'Y', 'y', 'G', 'N', '607']

24, 7, 20, 2101, 4355, 10, 11, 4701, 4, 22, 21, 11, 25, 25, 7, 14, 607