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: ['h', '6887', '2917', '1731', '7315', 'L', '8687', '3369', '7985', 'T', '5927', 'f', 'x', 'z', '39', 'k', '4125', '6275', '7057', 'a', '2417', 'R', '8719', '2853', 'j', 'M', '3331', '9865']

8, 6887, 2917, 1731, 7315, 12, 8687, 3369, 7985, 20, 5927, 6, 24, 26, 39, 11, 4125, 6275, 7057, 1, 2417, 18, 8719, 2853, 10, 13, 3331, 9865