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: ['m', 'u', '6295', '9545', 'w', '9553', '4419', '9399', '7855', '6583', 'c', '7747', 'V', '3365', 'D', 'F', 'V', 'V', 'Z', 'T', '3189', '5511', '4227', 's']

13, 21, 6295, 9545, 23, 9553, 4419, 9399, 7855, 6583, 3, 7747, 22, 3365, 4, 6, 22, 22, 26, 20, 3189, 5511, 4227, 19