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: ['6341', 'v', '8449', 'R', 'q', '4205', '4657', 'W', '1877', '3943', '7417', '9007', 'y', '7617', 'f', '4969', 'Y', '7109', 'w', 'w', '3555', '1331']

6341, 22, 8449, 18, 17, 4205, 4657, 23, 1877, 3943, 7417, 9007, 25, 7617, 6, 4969, 25, 7109, 23, 23, 3555, 1331