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: ['a', 't', 'b', 'M', 'x', '3359', 'A', 's', '9163', '1031', 'c', '7113', '3509', 'H', 'm', '8541', 'X', '6811', 'Z', '8169', '5251', '7485', '6047', '7493', 'T', 'd', 'E', 'C', '6633']

1, 20, 2, 13, 24, 3359, 1, 19, 9163, 1031, 3, 7113, 3509, 8, 13, 8541, 24, 6811, 26, 8169, 5251, 7485, 6047, 7493, 20, 4, 5, 3, 6633