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: ['j', '331', 'c', 'v', '8743', 'O', '6363', 'c', 'c', 'S', 'd', 'N', 'D', 'j', '4421', '7965', 'Y']

10, 331, 3, 22, 8743, 15, 6363, 3, 3, 19, 4, 14, 4, 10, 4421, 7965, 25