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: ['V', 't', '7461', 'R', 'M', 'R', '3179', 'p', 's', '3939', 'u', 'U', 'R', '1419', '2345', '2815', '4741', '4145', 'g', '7285', 'r', '2907', 'W', 'B', '4929', '8399', '7513', '1827', 'l', 'A', '9707', '6203', '683', 'B', '3079', 'a', '6043', 'C']

22, 20, 7461, 18, 13, 18, 3179, 16, 19, 3939, 21, 21, 18, 1419, 2345, 2815, 4741, 4145, 7, 7285, 18, 2907, 23, 2, 4929, 8399, 7513, 1827, 12, 1, 9707, 6203, 683, 2, 3079, 1, 6043, 3