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.

['U', '1531', 't', '6929', 'P', '9619', 'G', 'g', '8511']
21, 1531, 20, 6929, 16, 9619, 7, 7, 8511

['7199', '1787', '879', '3121', 'Y', '3363', 'O', 'g', 'j', '5767', '8799', '1811', '2255', 'i', 'g', 'D', 'm', 'v', 'm', 'm', '977', '7171', 'j', 'Y', '663', 'v', '5599', '3997', '8287', '7293', 'D']
7199, 1787, 879, 3121, 25, 3363, 15, 7, 10, 5767, 8799, 1811, 2255, 9, 7, 4, 13, 22, 13, 13, 977, 7171, 10, 25, 663, 22, 5599, 3997, 8287, 7293, 4

['N', '3635', 'a', 'G', '4961', '3627', 'v', '5247', 'A', '8143', '3641']

14, 3635, 1, 7, 4961, 3627, 22, 5247, 1, 8143, 3641