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: ['L', '2467', 'B', '389', '1061', '2115', 'Z', 'Q', '1313', 'O', 'A', '8697', '2037', 's', 'q', '3853', 'Y', '21', '2737', 'C', '7749', 'l', '9581', 'T', '8695', 'E', '1083', '7463', '6685', 'j', '2199', '9883', 'c', 'v', 'a', '2709']

12, 2467, 2, 389, 1061, 2115, 26, 17, 1313, 15, 1, 8697, 2037, 19, 17, 3853, 25, 21, 2737, 3, 7749, 12, 9581, 20, 8695, 5, 1083, 7463, 6685, 10, 2199, 9883, 3, 22, 1, 2709