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: ['u', '6149', '6059', '2115', '8345', '8605', '991', 'K', 'i', '9211', 't', '5089', 'e', 'v']

21, 6149, 6059, 2115, 8345, 8605, 991, 11, 9, 9211, 20, 5089, 5, 22