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', '6981', '8975', '8149', 'i', 'T', 'M', 'w', 'm', 'v', '649']

7, 6981, 8975, 8149, 9, 20, 13, 23, 13, 22, 649