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', '1479', '8847', 'g', 'Q', 'x', 'F', 'y', 'F', 'r', 'd', 'C', 'X', 'v', 'h', 'P', '5287', 'm']

14, 1479, 8847, 7, 17, 24, 6, 25, 6, 18, 4, 3, 24, 22, 8, 16, 5287, 13