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: ['1237', '927', '6535', 'f', '6313', '2847', 'g', '8773', '6781', '4261', '5595', 'b', '6039', 'M', 'u', '7963', '5551', 's', '9239', '5799', '8745', 'I']

1237, 927, 6535, 6, 6313, 2847, 7, 8773, 6781, 4261, 5595, 2, 6039, 13, 21, 7963, 5551, 19, 9239, 5799, 8745, 9