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: ['y', '6761', 'O', 'k', 'x', '6191', 'r', '4593', 'g', 'R', 'P', '5103', 'S', '2497', '6501', '2795', 'I', 'h', 'd', 'v', 'B', '5779', '4531', 'S']

25, 6761, 15, 11, 24, 6191, 18, 4593, 7, 18, 16, 5103, 19, 2497, 6501, 2795, 9, 8, 4, 22, 2, 5779, 4531, 19