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: ['7397', 'f', 'k', 'h', 'x', '5009', 's', '6299', '3843', 'B', 'k', 'w', '6935', 'P', 'N', '4577', '1031', '8437', '7643', '4837', 'I', 'g']

7397, 6, 11, 8, 24, 5009, 19, 6299, 3843, 2, 11, 23, 6935, 16, 14, 4577, 1031, 8437, 7643, 4837, 9, 7