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: ['8109', '8255', 'a', 'g', 'G', 'X', 'L', '6687', '5423', '2719', 'p', '5273', 'J', '4131', '3811', 'R', 'I', 't', '3489', 'L', '6611', 'L', '8631', 'D', '5973', 'E', 'p', 'o', '5329', '4087', '5379', 'H', '9409', 'H', 'X', '1417', '2263']

8109, 8255, 1, 7, 7, 24, 12, 6687, 5423, 2719, 16, 5273, 10, 4131, 3811, 18, 9, 20, 3489, 12, 6611, 12, 8631, 4, 5973, 5, 16, 15, 5329, 4087, 5379, 8, 9409, 8, 24, 1417, 2263