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: ['959', 'C', '8749', '3929', '8739', '3307', '2197', 'f', 'X', 'H', '3597', 't', 'Q', 'o', '3911', '7699', 'j', '9277', '233', '5801', 'u', '779', '7537', 'q', 'o', 'm', '8287', '6423', 'E', '9033', 'm', 'O', 'H']

959, 3, 8749, 3929, 8739, 3307, 2197, 6, 24, 8, 3597, 20, 17, 15, 3911, 7699, 10, 9277, 233, 5801, 21, 779, 7537, 17, 15, 13, 8287, 6423, 5, 9033, 13, 15, 8