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: ['Z', 'Q', '8857', 'f', 'r', '4149', 'p', 'p', 'b', 'q', 'G', 'X', 'l', '9079', 'K', 's', '7583', '1715', 'F', 'f', '2609']

26, 17, 8857, 6, 18, 4149, 16, 16, 2, 17, 7, 24, 12, 9079, 11, 19, 7583, 1715, 6, 6, 2609