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: ['p', 'u', '4713', 'V', 'b', 'b', 'i', '5537', 'Q', 'k', 'F', 'r', '6475', 'd', 'G', '1459', 'z', '4301', '2013', '9613', 'v', 'u', '7113', '7803', 'E', 'i', 'Y', '2685', '3795', 'c', '8773', 'q', 's', '367', 'C', 'c', '5907', 'I', '8451', 'y']

16, 21, 4713, 22, 2, 2, 9, 5537, 17, 11, 6, 18, 6475, 4, 7, 1459, 26, 4301, 2013, 9613, 22, 21, 7113, 7803, 5, 9, 25, 2685, 3795, 3, 8773, 17, 19, 367, 3, 3, 5907, 9, 8451, 25