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: ['A', 'I', '6083', 'y', '1185', '2241', 'I', 'b', 'D', 'Y', 'b', 'h', '3259', 'C', 'n', '6691', 'e', '1201', '5541', '581', '1113', '8083', '435', 'k', '2575', '4487', '4855', '1221', 'Z', '7661', '3489', 'O', '3345']

1, 9, 6083, 25, 1185, 2241, 9, 2, 4, 25, 2, 8, 3259, 3, 14, 6691, 5, 1201, 5541, 581, 1113, 8083, 435, 11, 2575, 4487, 4855, 1221, 26, 7661, 3489, 15, 3345