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: ['b', '2613', 'E', 'G', 'z', 'Z', '4737', '2489', '6019', 'j', 'y', 'Q', 'j', 'A', '7273', '6937', 'E', 'H', '1949', 'H', 'f', '4593', 'S', 'G', 'y', '4633', '3485']

2, 2613, 5, 7, 26, 26, 4737, 2489, 6019, 10, 25, 17, 10, 1, 7273, 6937, 5, 8, 1949, 8, 6, 4593, 19, 7, 25, 4633, 3485