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', '2357', 'M', '4211', '1867', 'F', 'k', '1571', 'H', 'd', 'm', '5941', 'l', 'M', 's', 'x', '8497', 'v', 'w', 'v', 'R', '7901', 'E', '6171', 'g']

25, 2357, 13, 4211, 1867, 6, 11, 1571, 8, 4, 13, 5941, 12, 13, 19, 24, 8497, 22, 23, 22, 18, 7901, 5, 6171, 7