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: ['9007', 'Q', 'o', 'J', '243', 'F', 'B', 'G', 'R', '747', 'u', 'p', '3317', 'j', '7629', 'l', '6597', '3015', 'u', '2191', 'p', '3067', '9847', 'C', '9589', '3519', 'A', 'I', 'p', '77', 'E']

9007, 17, 15, 10, 243, 6, 2, 7, 18, 747, 21, 16, 3317, 10, 7629, 12, 6597, 3015, 21, 2191, 16, 3067, 9847, 3, 9589, 3519, 1, 9, 16, 77, 5