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: ['S', '2925', 'W', 'f', 'u', 'e', '9331', '4955', '2535', 'a', 'b', '133', 'P', 'R', '147', '6479', 'm', 'v', '1829', '2095', '5827', 'u', 'U', 'u', 'G', 'M', '9505', '4143', '3351', '261', 'T', 'W', 'u', '7117', 'T', '3033', 'G', 'I', 'I', 'W']

19, 2925, 23, 6, 21, 5, 9331, 4955, 2535, 1, 2, 133, 16, 18, 147, 6479, 13, 22, 1829, 2095, 5827, 21, 21, 21, 7, 13, 9505, 4143, 3351, 261, 20, 23, 21, 7117, 20, 3033, 7, 9, 9, 23