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: ['f', 'K', '245', '9953', 'w', '7987', '479', 'D', '7873', 'P', 'k', 'R', 'a', 'D', 'W', 'b', '8995', '8795', '7257', 'm', '4245', 't', 'K', '7721', '6175', '7399', 's', '965', 'b', 'Z']

6, 11, 245, 9953, 23, 7987, 479, 4, 7873, 16, 11, 18, 1, 4, 23, 2, 8995, 8795, 7257, 13, 4245, 20, 11, 7721, 6175, 7399, 19, 965, 2, 26