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: ['x', 'C', '6883', '1377', 'i', '8243', 'c', '4763', 'K', 't', '6213', 'a', 'I', '8905', 'w']

24, 3, 6883, 1377, 9, 8243, 3, 4763, 11, 20, 6213, 1, 9, 8905, 23