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: ['2619', '2343', 'v', 'a', 'H', 'S', '6377', 'K', 'b', 'O', 'b', '4477', 'f', '6625', '7567']

2619, 2343, 22, 1, 8, 19, 6377, 11, 2, 15, 2, 4477, 6, 6625, 7567