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: ['4329', 'x', 'u', 'o', '6491', '1479', '3851', '9529', 'x', '5431', '4345', 'F', '1007', 'E', '7617', 'V', 'O', '7335', '3347', '4787', '3827', '8773', 'C', '1425', 'b', 'C', 'D', '9645', 'p', '5609', 'h', '2297', '9713', '2539', '5573', '4607']

4329, 24, 21, 15, 6491, 1479, 3851, 9529, 24, 5431, 4345, 6, 1007, 5, 7617, 22, 15, 7335, 3347, 4787, 3827, 8773, 3, 1425, 2, 3, 4, 9645, 16, 5609, 8, 2297, 9713, 2539, 5573, 4607