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: ['4027', 'y', 'n', '7069', '3069', 'r', '1015', '6853', 'n', '7221', 'V', 'U', '1935', 'x', 'I', 'I', '2969', 'J', '8735', '2497', 'h']

4027, 25, 14, 7069, 3069, 18, 1015, 6853, 14, 7221, 22, 21, 1935, 24, 9, 9, 2969, 10, 8735, 2497, 8