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: ['2359', '7035', 'w', '6209', 's', 'u', 'N', '9563', 'M', 'H', 'm', '123', 'g', '4627', '9215', 'k']

2359, 7035, 23, 6209, 19, 21, 14, 9563, 13, 8, 13, 123, 7, 4627, 9215, 11