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: ['579', '1711', '2791', 'H', 'i', 'X', '4869', 'V', '5655', '3205', '2159', 'y', 'y', 'i', 'U', 'p', 'c', '3837']

579, 1711, 2791, 8, 9, 24, 4869, 22, 5655, 3205, 2159, 25, 25, 9, 21, 16, 3, 3837