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: ['7147', '5625', 'j', 'B', 'z', 'k', '4011', '2207', '6035', '4485', 'A', 'm', 'p']

7147, 5625, 10, 2, 26, 11, 4011, 2207, 6035, 4485, 1, 13, 16