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: ['h', 'E', 'Z', 'b', '4099', '7811', 'K', 'S', 'J', '5461', '1087', 'T', '8789', 'n', '8363']

8, 5, 26, 2, 4099, 7811, 11, 19, 10, 5461, 1087, 20, 8789, 14, 8363