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: ['L', '467', 'C', 'F', '9769', 'Y', 'k', 's', 'i', 'U', '6413', '7585', '4881', 'w', '755', '5763', '6783', '1183', 'c', '6167', '1089', '2463', 'O', '201', 't', 'p']

12, 467, 3, 6, 9769, 25, 11, 19, 9, 21, 6413, 7585, 4881, 23, 755, 5763, 6783, 1183, 3, 6167, 1089, 2463, 15, 201, 20, 16