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: ['n', 'i', '5135', '2101', 'P', '2789', 'G', '9679', 'z', '5503', 'g', '2677', 'V', '2851', 'B', 'a', 'F', '7127']

14, 9, 5135, 2101, 16, 2789, 7, 9679, 26, 5503, 7, 2677, 22, 2851, 2, 1, 6, 7127