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: ['5501', '2563', 'H', '4465', 'J', 'k', '8593', '6545', '4233', 't', 'N']

5501, 2563, 8, 4465, 10, 11, 8593, 6545, 4233, 20, 14