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: ['2741', 'U', 'G', '7177', 'i', '8837', 'i', '3907', '4543', 'g', '5267', '2845']

2741, 21, 7, 7177, 9, 8837, 9, 3907, 4543, 7, 5267, 2845