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: ['8353', '3051', 'H', '4227', '6855', '5933', '2647', 'a', '6469', 'Z', 'L', '1185', 'C', '5969', '3743', '261', 't', '8559', 'n', '6719', 'S', 'Z', '8111', '5361', 'p', 'P', 'R', 'w', '4055', '9103', '1331', '6141', '2535', 'J', 'O', 'z', '349']

8353, 3051, 8, 4227, 6855, 5933, 2647, 1, 6469, 26, 12, 1185, 3, 5969, 3743, 261, 20, 8559, 14, 6719, 19, 26, 8111, 5361, 16, 16, 18, 23, 4055, 9103, 1331, 6141, 2535, 10, 15, 26, 349