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: ['K', '5507', 'J', '6491', 'U', '3809', '319', 'v', 'v', '6473', 'f', '8069', 'A', 'f', 'x', 'v', '9303', 'b', 'w', 'J', 'L', 'W', '7443', '5511', '7221', '9293', '5221', '8869']

11, 5507, 10, 6491, 21, 3809, 319, 22, 22, 6473, 6, 8069, 1, 6, 24, 22, 9303, 2, 23, 10, 12, 23, 7443, 5511, 7221, 9293, 5221, 8869