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: ['3491', 'J', '3567', 'S', 's', '5697', '4817', '6117', 'B', 'I', '6247', '5671', 'z', 'g', 'j', 'h', '5373']

3491, 10, 3567, 19, 19, 5697, 4817, 6117, 2, 9, 6247, 5671, 26, 7, 10, 8, 5373