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: ['2581', 'C', 'Q', 'F', '6115', 'Q', 'k', 'l', '5061', '3049', 'm', 'C', 'T', 'W', 'm', '883', '597', 'b', '465', 'p', '8673', 'k', 'I']

2581, 3, 17, 6, 6115, 17, 11, 12, 5061, 3049, 13, 3, 20, 23, 13, 883, 597, 2, 465, 16, 8673, 11, 9