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: ['1989', '4933', 'Y', '6791', 'e', 'J', '2653', 'p', 'I', 'Z', '447', '9965', 'b', '9715', '1111', 'o', '3535', 'w', 'a', '7259', 'C', 'y', 'H', '3099', '9165', 'A', 'l', 's', 'M', 'f', '1311', '7383']

1989, 4933, 25, 6791, 5, 10, 2653, 16, 9, 26, 447, 9965, 2, 9715, 1111, 15, 3535, 23, 1, 7259, 3, 25, 8, 3099, 9165, 1, 12, 19, 13, 6, 1311, 7383