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: ['r', '9827', 'u', 'h', '8195', '6009', '4885', '5349', 'e', '5945', 'Z']

18, 9827, 21, 8, 8195, 6009, 4885, 5349, 5, 5945, 26