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', '1617', 'h', 'M', '6663', '1285', '8475', '4703', '5183', '8447', '799', 'D', '9019', '3127', '235', '6441', 'p', '9503']

4, 1617, 8, 13, 6663, 1285, 8475, 4703, 5183, 8447, 799, 4, 9019, 3127, 235, 6441, 16, 9503