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: ['2661', '9623', 'T', '8175', 'S', '281', '5121', '9157', 'P', '6899', '6207', 'g', '6801', '9055', '5887', 's', '5799', '6081', 'L', '149', 't', 'q', 'd', '1689', '383', 'S', 'y', '4795', '6573', 'N', 'H']

2661, 9623, 20, 8175, 19, 281, 5121, 9157, 16, 6899, 6207, 7, 6801, 9055, 5887, 19, 5799, 6081, 12, 149, 20, 17, 4, 1689, 383, 19, 25, 4795, 6573, 14, 8