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: ['F', '9727', 'i', '629', 'w', '5589', 'C', '8363', '3079', '9417', 'r', 'M', '3853', '4105', '6221', 'U', 'u', '4365', 'u', '2303', 'j', '1843', '477', 's', '9767', '8947', '727', '8305', '7679', '8903', '2961', 'O', '281', '6049', '171', 'v', '3995', 'C', '8139', 'P']

6, 9727, 9, 629, 23, 5589, 3, 8363, 3079, 9417, 18, 13, 3853, 4105, 6221, 21, 21, 4365, 21, 2303, 10, 1843, 477, 19, 9767, 8947, 727, 8305, 7679, 8903, 2961, 15, 281, 6049, 171, 22, 3995, 3, 8139, 16