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: ['3971', '3925', '9969', 'c', 'n', 'S', '8491', 'T', 'K', '9291', 'l', '4605', '4849', 'B', 'c', '7965', 'T', 'V', '5013', '1337', 'D', '483', '2047', '67', 'v', 'L', 'x', 'Z', '5253', 'n', 'N', 'C', 'P', '8779', 'O', 'w', '2297', '479', '8849']

3971, 3925, 9969, 3, 14, 19, 8491, 20, 11, 9291, 12, 4605, 4849, 2, 3, 7965, 20, 22, 5013, 1337, 4, 483, 2047, 67, 22, 12, 24, 26, 5253, 14, 14, 3, 16, 8779, 15, 23, 2297, 479, 8849