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: ['c', 'a', '3803', 'p', '4967', '1779', '8395', '7399', 'G', 'l', 'w', 'H', 'F', '5019', '6421', 'S', 'y', '7797', '6957', 'R', '5661', 'I', 'p']

3, 1, 3803, 16, 4967, 1779, 8395, 7399, 7, 12, 23, 8, 6, 5019, 6421, 19, 25, 7797, 6957, 18, 5661, 9, 16