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: ['2449', 'k', 'Q', 'L', '3783', '995', 'r', '7159', '6671', '9241', '6479']

2449, 11, 17, 12, 3783, 995, 18, 7159, 6671, 9241, 6479