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: ['1899', 'M', 'o', '6549', '1537', 'n', 'w', 'N', 'D', '927', 'J', 'P', '8217', '7959', '7599', '8249', 'V', '7585', '7267', '8155', 'i', '3565', '2755', '927', '7179', 't', 'Z', '2259', 'f', '7173', 'R', 'T', '7275', 'w', '9001']

1899, 13, 15, 6549, 1537, 14, 23, 14, 4, 927, 10, 16, 8217, 7959, 7599, 8249, 22, 7585, 7267, 8155, 9, 3565, 2755, 927, 7179, 20, 26, 2259, 6, 7173, 18, 20, 7275, 23, 9001