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: ['6431', '8167', '7089', '491', 'v', 'I', '6393', 'T', '7543', '1507', '5829', '441', 'X', '7055', '251', '7013', '2247', 'p', '4801', 'Q', 'Z', 'x', '7447', '9643', 'd']

6431, 8167, 7089, 491, 22, 9, 6393, 20, 7543, 1507, 5829, 441, 24, 7055, 251, 7013, 2247, 16, 4801, 17, 26, 24, 7447, 9643, 4