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: ['941', '5475', 'L', 'H', '8255', 'B', 'g', '2721', '9759', 'S', '5223', 'f', 'S', '8977', 'U', 'Q', '5057', 'l', 'M', 'u', '5161', '5361', 'e', 'V', '1177']

941, 5475, 12, 8, 8255, 2, 7, 2721, 9759, 19, 5223, 6, 19, 8977, 21, 17, 5057, 12, 13, 21, 5161, 5361, 5, 22, 1177