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: ['y', '6735', 'b', 'G', '7335', '7703', '3671', 'x', '953', '2481', 'j', '8605', 'i', '115', '8565', '7197', '2293', '1495', 'C', 'e', '6409', 'W', '4825', '5473', '9697', 't', 'j', 'N', 't', '897', '8459', '6171', 'R', '7607']

25, 6735, 2, 7, 7335, 7703, 3671, 24, 953, 2481, 10, 8605, 9, 115, 8565, 7197, 2293, 1495, 3, 5, 6409, 23, 4825, 5473, 9697, 20, 10, 14, 20, 897, 8459, 6171, 18, 7607