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: ['6465', '4039', '6403', '5323', 'M', '4245', 'u', '3055', '3575', 'V', '6883', '6439', '4715', '7117', 's', 'v', '1905', '8833', '9539', 'M', 'k', 'b', '1995', 'v', '7617', '6061', 'd', 'C', '1051', 'f', '9493', 'w', '709', '1651', '9115', '6957', 'J', '203', '6435']

6465, 4039, 6403, 5323, 13, 4245, 21, 3055, 3575, 22, 6883, 6439, 4715, 7117, 19, 22, 1905, 8833, 9539, 13, 11, 2, 1995, 22, 7617, 6061, 4, 3, 1051, 6, 9493, 23, 709, 1651, 9115, 6957, 10, 203, 6435