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', 'j', 'e', 'k', 'n', 'I', 'r', '1941', '7277', '687', '9877', 'x', 'g']

21, 10, 5, 11, 14, 9, 18, 1941, 7277, 687, 9877, 24, 7