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: ['P', '109', 'P', '9289', '6211', '4735', 'j', '4273', '541', '6033', '9145', '9453', 'x', '6775', 's', 'D', '2701', 'L', 'Y', 'd', 'I', 'Y']

16, 109, 16, 9289, 6211, 4735, 10, 4273, 541, 6033, 9145, 9453, 24, 6775, 19, 4, 2701, 12, 25, 4, 9, 25