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: ['1089', 'j', '3813', 'U', '5271', 'C', 'p', 't', '7873', 'i', 'F', 'y', 'e', 'h', '8107', '7167', 'P']

1089, 10, 3813, 21, 5271, 3, 16, 20, 7873, 9, 6, 25, 5, 8, 8107, 7167, 16