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: ['1259', '7663', '1233', 'E', '9917', 'q', '9685', 'm', 'c', 'N', '2531', '9113']

1259, 7663, 1233, 5, 9917, 17, 9685, 13, 3, 14, 2531, 9113