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: ['1737', 'o', 'X', 'W', 'I', 'H', 'Q', 'D', 'R', 'T', 'Z', 'N', 'M', '5229', 'W']

1737, 15, 24, 23, 9, 8, 17, 4, 18, 20, 26, 14, 13, 5229, 23