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: ['Q', 'A', '2253', '4839', 'O', 'V', 'u', '3689', 'O', '2095', '1395', '6897', '2135', '4465', 'd', 'N', '3505', '4125', '7945', 'w', 'Z', '5565', 'I']

17, 1, 2253, 4839, 15, 22, 21, 3689, 15, 2095, 1395, 6897, 2135, 4465, 4, 14, 3505, 4125, 7945, 23, 26, 5565, 9