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: ['4939', '8361', 'i', 'Q', 'W', '141', 'N', '5709', '7851', '1709', 'h', 'B', 'Y', '5527', 'V', '7137', '8127', 'Z', 'P', 'E', '7553', 'R', 'r', 'r']

4939, 8361, 9, 17, 23, 141, 14, 5709, 7851, 1709, 8, 2, 25, 5527, 22, 7137, 8127, 26, 16, 5, 7553, 18, 18, 18