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: ['D', '1383', '6831', '3099', '3117', 'j', '5969', 'x', 'p', '6801', 'T', '3589', '6399', '5499', '8255', 'i', '6979', '8315', '7183', 'y', 'o', '4211', '741', '7053', 'o']

4, 1383, 6831, 3099, 3117, 10, 5969, 24, 16, 6801, 20, 3589, 6399, 5499, 8255, 9, 6979, 8315, 7183, 25, 15, 4211, 741, 7053, 15