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: ['J', '5813', 'n', '7901', 't', '7213', 'T', '1657', 'r', '5163', '95', 'K', 'k', 'g', '7655', '1221', 'b', '7001', '8469', '2641', '1887', 'z', '6649', 'R', '9983', 'W']

10, 5813, 14, 7901, 20, 7213, 20, 1657, 18, 5163, 95, 11, 11, 7, 7655, 1221, 2, 7001, 8469, 2641, 1887, 26, 6649, 18, 9983, 23