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: ['6695', '6659', '8245', '5281', '4665', 'M', 'H', '2839', 'X', '6107', 'b', 'U', 'q', 'N', 'K', 'T', 'U', 'u', '9771', '2541', '1639', '6055', '5329', '4183', '9189', '8917', '7959', '5329', 'K', 'Y']

6695, 6659, 8245, 5281, 4665, 13, 8, 2839, 24, 6107, 2, 21, 17, 14, 11, 20, 21, 21, 9771, 2541, 1639, 6055, 5329, 4183, 9189, 8917, 7959, 5329, 11, 25