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: ['6801', '5919', '3663', '5677', '665', '1433', 'i', 'p', 'Q', 'P', '6497', 'O', '9151', '9861', '2481', '2335', 'N', 'A', 'y', 'd', '9051', '9277', '615', 'Y', '3361', '9015', 'u', '7279', '2143', 'v', '757', 'z', '1837', 'F']

6801, 5919, 3663, 5677, 665, 1433, 9, 16, 17, 16, 6497, 15, 9151, 9861, 2481, 2335, 14, 1, 25, 4, 9051, 9277, 615, 25, 3361, 9015, 21, 7279, 2143, 22, 757, 26, 1837, 6