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: ['5681', '1273', 'M', '9091', 'x', '9659', 'A', '1883', '4421', 'D', 'a', '9859', 'd', 'd', '3035', '8755', '5411', 'U', '1531', '8363', '2187', 'p', '2085', 'C', '9869', 'd', '907', '4279', '6813', '7457', 'V', 'I', 'o', '9119', 'e', 'K']

5681, 1273, 13, 9091, 24, 9659, 1, 1883, 4421, 4, 1, 9859, 4, 4, 3035, 8755, 5411, 21, 1531, 8363, 2187, 16, 2085, 3, 9869, 4, 907, 4279, 6813, 7457, 22, 9, 15, 9119, 5, 11