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: ['995', '8927', '3477', 'n', '9959', 'r', '1763']

995, 8927, 3477, 14, 9959, 18, 1763