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: ['1919', '2925', '4783', 'b', 'k', 'E', '7861', '8043', 'k', 'N', 'c', '4017', '2171', 'S', '6713', '8727', 'L', 'm', 'V', 'f', 'N', 'a', '3577', 'i', 'r']

1919, 2925, 4783, 2, 11, 5, 7861, 8043, 11, 14, 3, 4017, 2171, 19, 6713, 8727, 12, 13, 22, 6, 14, 1, 3577, 9, 18