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: ['8185', '7423', '481', '4469', '5421', 'b', 'M', 'K', '8511', '6765', 'n', 'p', 'o', '8695', 'N', '1037', 'N', 'd', '5401', 'f', 'D', '3871']

8185, 7423, 481, 4469, 5421, 2, 13, 11, 8511, 6765, 14, 16, 15, 8695, 14, 1037, 14, 4, 5401, 6, 4, 3871