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: ['D', 'p', '5121', 'M', '4331', '6279', '7571', 'x', '8227', 'V', 'H', '8109', '3467', '347', '7821', 'Q', '6213', '4619', 'S', '9445', '2255', '6137', '9635', 'e', '3429', '3117', 'm', 's', '4127']

4, 16, 5121, 13, 4331, 6279, 7571, 24, 8227, 22, 8, 8109, 3467, 347, 7821, 17, 6213, 4619, 19, 9445, 2255, 6137, 9635, 5, 3429, 3117, 13, 19, 4127