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: ['6045', 'w', '2317', 'Z', '6047', '3951', '511', 'D', '4049', '7197', '2371', 'a', 'b', '927', '5153', '8657', '9403', 'C', '1429', '3423', 'T', '9839', 'M', 'l']

6045, 23, 2317, 26, 6047, 3951, 511, 4, 4049, 7197, 2371, 1, 2, 927, 5153, 8657, 9403, 3, 1429, 3423, 20, 9839, 13, 12