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: ['l', 'U', 'b', 'j', 'j', 'd', 'E', '3481', '4597', '4893', 's', '5127', 'M', 'V', '5671', '7459', 'd', '131', '9891', 'p', '611', 'B', '929', '6925', '4529', 'X', 'z', '8555', 'J', 'h', 'p', '5897', '1129', 'd', 'F', '8161', '7003', 'B']

12, 21, 2, 10, 10, 4, 5, 3481, 4597, 4893, 19, 5127, 13, 22, 5671, 7459, 4, 131, 9891, 16, 611, 2, 929, 6925, 4529, 24, 26, 8555, 10, 8, 16, 5897, 1129, 4, 6, 8161, 7003, 2