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: ['g', 'Y', 'v', 'U', 'h', '2305', '5289', 'G', '531', '9893', 't', 'o']

7, 25, 22, 21, 8, 2305, 5289, 7, 531, 9893, 20, 15