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', 'T', '6107', '5477', 'W', '3671', '1449', 'p', '5333', 't', '8241', '3185', 'R', '7217', 'l']

4, 20, 6107, 5477, 23, 3671, 1449, 16, 5333, 20, 8241, 3185, 18, 7217, 12