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: ['4091', '6309', '5497', 'a', 'x', '4225', 'P', 'd', 'w', '1151', 'h', 'S', 'Y', 'L', '953', 'k', '6869', 'j', '9609', 'K', '9149', '4479', '8557', 'I', 'B', 'm', 'z', 'l', '8833', 'T', 'U', '1563', '2211', '4859']

4091, 6309, 5497, 1, 24, 4225, 16, 4, 23, 1151, 8, 19, 25, 12, 953, 11, 6869, 10, 9609, 11, 9149, 4479, 8557, 9, 2, 13, 26, 12, 8833, 20, 21, 1563, 2211, 4859