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: ['1109', 'P', '7707', '3795', '1505', '7363', '1923', 'A', 'W', '8657', 'u', 'u', 'H', 'l', 'V', 'U', '4567', '9887', 'T', '2581', '6311', 'a', '3815', 'm', 'L', 'F', 'u', '1093', 'J', '3315', 'f', 'I', '6511', '5847', '3895', 'f']

1109, 16, 7707, 3795, 1505, 7363, 1923, 1, 23, 8657, 21, 21, 8, 12, 22, 21, 4567, 9887, 20, 2581, 6311, 1, 3815, 13, 12, 6, 21, 1093, 10, 3315, 6, 9, 6511, 5847, 3895, 6