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: ['R', 'k', 'V', 'r', '8163', '2803', 'b', 'w', 'm', 'R']

18, 11, 22, 18, 8163, 2803, 2, 23, 13, 18