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: ['9249', '565', 'W', '7649', 'O', 'Z', 'p', 'Z', 'p', 'n', '1859', '9463', '1967', '7935', 'V', 'y', 'W']

9249, 565, 23, 7649, 15, 26, 16, 26, 16, 14, 1859, 9463, 1967, 7935, 22, 25, 23