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: ['7949', '5233', '725', '7169', '8437', 'i', '1795', 'u', 'C', 'w', '6381', '5549', 'G', '8147', '7231', 'z', 'e', '2679']

7949, 5233, 725, 7169, 8437, 9, 1795, 21, 3, 23, 6381, 5549, 7, 8147, 7231, 26, 5, 2679