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: ['1483', '7045', 'F', '79', 'G', 'Z', '127', 'O', '4081', '7519', 'N', 'u', 'T', 'g', '5263', '487', 'm', 'L', '819', '7921', 'z', 'N', '3239', '8021', 'Q', 'I', 'F', 'R', '2347', '7199', 'C', 'm', '9991']

1483, 7045, 6, 79, 7, 26, 127, 15, 4081, 7519, 14, 21, 20, 7, 5263, 487, 13, 12, 819, 7921, 26, 14, 3239, 8021, 17, 9, 6, 18, 2347, 7199, 3, 13, 9991