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: ['8553', '591', '4135', '7545', 'j', 'y', 'C', 'f', 'o', 'X', '4691', 'l', 'I', '361', 'Y', '4935', 'b', '6307', '6669', '1593', '3837', 'x', '3705', '3205', '5045', 'v', 't', '5855', 'V', 'W', 's']

8553, 591, 4135, 7545, 10, 25, 3, 6, 15, 24, 4691, 12, 9, 361, 25, 4935, 2, 6307, 6669, 1593, 3837, 24, 3705, 3205, 5045, 22, 20, 5855, 22, 23, 19