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', '4369', 'a', 'v', '2203', 'p', 'S', 'O', 'K', 'a', '7979', '6285', '6615', 'i', '2183', 'c', '1457', '123', 'w', '4863', '8199', '1423', 'V', 'F', 'C', 'z', '8339', 'z', '3769', 'D', 'V', 'S', 'y', 'l', 'M', 'X', 'N', 'S', '9259', 'v']

6, 4369, 1, 22, 2203, 16, 19, 15, 11, 1, 7979, 6285, 6615, 9, 2183, 3, 1457, 123, 23, 4863, 8199, 1423, 22, 6, 3, 26, 8339, 26, 3769, 4, 22, 19, 25, 12, 13, 24, 14, 19, 9259, 22