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: ['1185', '5343', '2657', '3487', '1477', '4069', 'u', '8781', '7751', '4155', '8631', '8237', '8433', 'z', 'E', 'Z', 'o', 'R', '3213', '8629', 'D', 'T', '2615', 'M', '5203', 'r', '4515', '3519', 'g']

1185, 5343, 2657, 3487, 1477, 4069, 21, 8781, 7751, 4155, 8631, 8237, 8433, 26, 5, 26, 15, 18, 3213, 8629, 4, 20, 2615, 13, 5203, 18, 4515, 3519, 7