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: ['1309', 'L', '9073', 'f', '1363', '2939', '2223', '1039', 'o', '8293', '2113', 'o', '6687', '8235', '9267', '1759', 'z', '2627', '5427']

1309, 12, 9073, 6, 1363, 2939, 2223, 1039, 15, 8293, 2113, 15, 6687, 8235, 9267, 1759, 26, 2627, 5427