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: ['7223', '6863', 'H', 'u', 'L', 'T', '2749', '2713', '5133', '6067', '965', 't', 't', '625', 'Z', 'E', '2857', 'e']

7223, 6863, 8, 21, 12, 20, 2749, 2713, 5133, 6067, 965, 20, 20, 625, 26, 5, 2857, 5