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: ['y', '3471', '4691', 'A', 'T', 'q', '4723', '4981', 'A', 'l', 'l', '8285', 'T', '6217', 'I', '9211', 'Y', 'I', '6707', '9655', '5949', '6989', '7043', '4679', '5857', '7569', '6193']

25, 3471, 4691, 1, 20, 17, 4723, 4981, 1, 12, 12, 8285, 20, 6217, 9, 9211, 25, 9, 6707, 9655, 5949, 6989, 7043, 4679, 5857, 7569, 6193