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: ['N', 'H', 'O', '7245', 'g', 'Y', 'x', 'b', 'h', '7901', '1405', '2649', '4955', '1571', 'j', 'O', 'L', 'Q', 's', 'y', '6271', '2077', '7545', '7263', '1657']

14, 8, 15, 7245, 7, 25, 24, 2, 8, 7901, 1405, 2649, 4955, 1571, 10, 15, 12, 17, 19, 25, 6271, 2077, 7545, 7263, 1657