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: ['z', '9731', 'j', '7153', '4883', '3123', '7483', '1517', 'A', '7657', '9271', '7', '5085']

26, 9731, 10, 7153, 4883, 3123, 7483, 1517, 1, 7657, 9271, 7, 5085