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: ['Q', 'm', 'A', 'T', '2249', '3755', 'b', '8493', 'q', '4337', '5115', 'n', 'V', 'a', '8529', 'G', '6475', '423', 'F', 'P', 'm']

17, 13, 1, 20, 2249, 3755, 2, 8493, 17, 4337, 5115, 14, 22, 1, 8529, 7, 6475, 423, 6, 16, 13