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: ['6349', 'A', 'V', 'y', '647', '491', 'e', '8645', 'u', 'k', '4195', 'g', 'C', 'd', '5327', '4915', '2391', 'y', 'r', '9427', 'V', '9443', 'w', '5677', 'a', 'M', '7485', '4605', '8445', 'f', 'S', 'b', 'f', 'D']

6349, 1, 22, 25, 647, 491, 5, 8645, 21, 11, 4195, 7, 3, 4, 5327, 4915, 2391, 25, 18, 9427, 22, 9443, 23, 5677, 1, 13, 7485, 4605, 8445, 6, 19, 2, 6, 4