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', '7689', 'l', '2225', '2653', 'o', 'P', '767', '9077', '1799', '7917', '43', '6633', '9857', '3307', 'J', 'R', 'Y', '5243', '4523', '577']

4, 7689, 12, 2225, 2653, 15, 16, 767, 9077, 1799, 7917, 43, 6633, 9857, 3307, 10, 18, 25, 5243, 4523, 577